Tour to Neocene
|
||||||||||||
The nature of Africa has taken up the first impact from the
direction of people. It was an Africa, where this mammalian species had appeared
first and then changed the course of evolution at the whole planet. It looks
like a paradox, but megafauna – the community of large herbivores hunted by
predators – held its positions in Africa for an especially long time. African
species had time to adapt to evolution of this aggressive and inventive creature,
and the fear in relation to the human appeared at them, which allowed even to
large species to survive for any time side by side with people. At the other
continents after the appearing of people the megafauna appeared exterminated
within very short term. But the human influence to the nature grew gradually,
and even in Africa the megafauna had survived in vanishingly small amount, closed
in the limited territories of nature reserves. Extinction of mankind has improved
a distress of megafauna in very little degree: a genetic variety of the escaped
populations of once numerous species appeared insufficient for a survival, and
human activity had resulted in destruction of productive habitats and their
transformation into the semidesertic areas not capable to support large animals.
Climatic changes at the boundary of Holocene and Neocene had caused mass extinction
of species, and representatives of former African megafauna snuffled into oblivion
in common with the set of other animal species, having left the Earth ruled
by tiny species. And the forms escaped after natural catastrophe had taken advantage
of the resulted position to the full. Their descendants had settled the developing
communities and evolved to creatures not seen on Earth before.
In Neocene epoch North Africa from Gibraltar isthmus and Atlas Mountains at
the north up to a woodland zone at the south of former Sahara desert represents
a savanna. The winding river flows across it, originating in mountains at the
east – it is Saharan Nile. True sources of Nile do not belong to Africa since
the time when the East-African subcontinent, or Zinj Land, had broken off from
it. Rains from Tanganyika Passage support the existence of bogs in which some
inflows of Saharan Nile originate. This river supports life of diverse inhabitants
of savanna: it is very difficult to recognize in them shy and small creatures,
which were their ancestors in human epoch.
Giant beast of gorilla-like appearance had risen on hind legs and eats leaves
of acacia. It is one of the largest species in African savannas, the savanna
ndipiniotherium. The skin of animal is covered with yellowish wool, and along
the back the dark “belt” stretches, extending on hips. Breast and throat of
this animal are white – it is an attribute of maturity.
Ndipinotheres are ecological analogues of elephants in Neocene African savanna.
Rising on hind legs, they easily eat foliage of acacias at height of up to five
meters. Forepaws of ndipinotherium have special anatomic features: there are
two fingers on them, which take up the whole loading during the walking of animal,
and from both sides mobile fingers adjoin to them, with which help the animal
can grasp tree branches. Having decided to eat appetizing leaflets on top branches
of tree, ndipinotherium rears up and slightly leans one forepaw against the
tree trunk. Using another paw, it picks up the branch and drags it to itself.
Strong and constantly growing incisors inherited from hyrax, its ancestor, help
ndipinotherium to bite off young leafy shoots of plants. The only competitor
of ndipinotherium in feeding on foliage of trees is giraffe
ostrich – a bulky bird having even higher growth.
High productivity of natural communities of Neocene and relative stability of
habitats had resulted in origin of a plenty of large species among which ndipinotheres
and giraffe ostriches are the true giants. In general, the African megafauna
of Neocene epoch is comparable to megafauna of pre-human era in productivity,
but differs from it completely by another qualitative structure. Ndipinotheres
and flathorns, their relatives,
are very large descendants of hyraxes – small and inconspicuous animals of human
epoch. They evolved from small animals to ecological analogues of rhinoceroses
and elephants. Ndipinotheriums literally look down on flathorns: flathorn feeds
on undersized vegetation, and ndipinotheres prefer high bushes and trees. Ndipinotheriums
gather in numerous herds numbering of some tens of individuals. It is easier
to them to protect themselves this way against large predators living in savanna.
The herd of ndipinotheriums represents some tens of large animals which surpass
any predators of Neocene savannas in size. But the herd is non-uniform – it
includes not only well-protected individuals, but also the most vulnerable ones.
The youngest cubs persistently follow their mothers, and in case of danger they
can expect for reliable protection. Large adult individuals are strong enough
to throw off the attacked predator from themselves and to crush it by their
weight. But there is a special age group, which representatives fall victims
of predators more often – these are juveniles, young individuals too large for
mother to continue their protection (as a rule, at this time it already takes
care to new cub), but too small to take the certain place in hierarchy of herd
and to protect itself independently against a predator.
Young ndipinotheres keep at the edge and at the end of herd. They do not know
everything about the world around, but already are too self-confident. They
take a liberty to separate from herd in searches of food, and thus represent
an ideal target for a predator.
Where there is a prey, the set of predators will gather. Three young ndipinotheriums
wander in thickets of undersized acacias at some distance from the main herd.
Animals rise on hind legs and eat foliage of acacias, of the most widespread
trees of African savanna of Neocene. Pointed prickles do not prevent them: animals
accurately tear leaves off with the help of long mobile tongues. They see perfectly,
how somewhere in the distance magnificent barbed
herzogcat with long hairy “mantle” on shoulders hunts any small rodents.
They also keep up the herd of congeners, being ready to return in any minute
to appear in safety under protection of adult animals. But these animals do
not notice that somebody observes of them.
From a bush which grows at some distance from the herd, a predator keeps an
eye on ndipinotheres within several hours. Yellow eyes keep up movements of
animals, and claws stick into the ground impatiently. The predator must choose
a proper time for an attack and must make only one successful rush. Deadlynetta,
a leopard-sized saber-toothed predator, prepares to attack. This large representative
of viverrids is a specialized hunter for big game, which can be dangerous. Therefore
the animal waits until young ndipinothereswill walk away enough from herd.
The herd of ndipinotheres moves forward gradually. These animals must constantly
move along the savanna, because if they would stay for a long time at the same
place, they can deplete fodder resources. Therefore deadlynetta can only infrequently
hunt ndipinotherium. But it knows how to make it in most successful way.
Young ndipinotheres stopped for a while near an acacia, and the herd walked
away from them for about one hundred meters. Having noticed it, two young males
left off the feeding and rushed to the herd with a clumsy jog trot. But female
is late for some seconds. And then something inevitable happens. As if a certain
black-and-white lightning deadlynetta jumps out from an ambush. With its whole
bulk it strikes a blow to the side of young ndipinotherium female and brings
it down on the ground. Predator keeps its prey on the ground for some seconds,
and at this time the main action takes place: deadlynetta puts deep wound with
dagger-like canines to the basis of neck of ndipinotherium female. Having quickly
pulled out canines from prey body, deadlynetta jumps aside away and stops in
grass, panting hardly. The power struggle of predator and prey can’t proceed
for a long time: defending itself, herbivore can put a dangerous wound to a
predator, or even to kill its enemy. But the most important thing had been made:
fatal impact is put, and now getting of prey is a matter of time only.
Deadlynetta looks quietly, how fatally wounded ndipinotherium female rises from
the ground, reeling, and tries to come up the herd of congeners. In air the
terrible smell of blood appears, and the frightened herd of ndipinotheres moves
faster. Female tries to reach its congeners, but it weakens with each heartbeat.
From its wound pulsating flow of scarlet blood runs, leaving an appreciable
trace on the ground. Huge animal bleeds profusely gradually and lags behind
group of the scared relatives more and more. Ndipinotherium female reels and
breathes hoarsely. It is exsanguinated badly, and feels lack of oxygen. It walksslower
and slower, moving its legs hardly. At last it faints and falls on the ground
heavily.
Hunting is finished. When deadlynetta has come nearer to its prey, last spasms
already contracted the body of ndipinotherium female. Having leaked once the
blood still flowing from the wound at the base of animal’s neck, deadlynetta
looked around. Having got its prey, the predator should be very cautious, because
other predators, and even simply its own congeners can easily take it away.
But deadlynettas live in savanna rather sparsely, like any other large game
hunters. Its nearest relative, probably, hunts or has a rest at the distance
of ten kilometers from it. But there is a set of other lovers of another’s prey,
and they start gathering gradually.
The success of deadlynettahas not remained unnoticed: it is difficult for hiding.
The smell of blood spreads for hundreds meters from a killed animal, and it
is something like an invitation to dinner for numerous scavengers. The fastest
and most impatient of them have started a meal, maybe, even faster, rather than
the hunter did. Deadlynetta stuck its canines into skin on stomach of ndipinotherium,
and had jerked it. Predator has torn off a huge rag of skin and meat, and guts
of animal have fallen out from the break in belly. Flies hover around the muzzle
of deadlynetta soiled with blood, and small beetles creep on skin of killed
animal. Deadlynetta almost does not pay attention to them, and only sometimes
shakes its head and sneezes, when the careless insect gets directly into its
nostril. Flies and beetles are usual companions of predators and constant visitors
on carcasses of killed or died animals from time immemorial. But in Neocenesome
more unexpected companions are added to them –these ones are butterflies. It
would be least possible thing to expect for appearing of these fragile and refined
creatures on blood-stained prey of a predator, but, nevertheless, in Northern
Africa there is one kind of butterflies which feeds exclusively on blood and
tissue liquid of dead animals. This butterfly is named as grieving swallowtail
and differs in rather large size and characteristic appearance. Wingspan of
grieving swallowtail reaches approximately 15 cm. This butterfly has white color
which is shaded with black border at external and back edges of wings. Butterflies
with strict colouring fly above the carcass of animal, and are not afraid at
all of presence of large predator. They gather in great number on tattered carcass
of ndipinotherium. Grieving swallowtails hover like a cloud above the head of
deadlynetta devouring its prey. One by one butterflies alight on skin of dead
ndipinotherium, and, having unwrapped thin proboscises, suck the blood exuding
from broken off flesh, not paying attention to flies and beetles scurrying around.
Some insects, the most courageous of all, even alight on muzzle of predator.
Deadlynetta shakes its head, driving importunate insects away, but it helps
only a little: having flush in air and having hovered for a while, butterflies
return to the blood-soiled wool of predator. Butterflies suck blood and meat
juice, taking advantage from the presence of predator near its prey. Other carrion
devourers are still waiting for their time now: deadlynetta can kill them, if
they will come nearer carelessly and too early. And butterflies use this moment.
When deadlynetta will be saturated, they also will be compelled to leave a place
of the feast – the neighbourhood of other scavengers is dangerous for them.
While deadlynetta eats meat, on branches feathery guests gather, having great
plans relatively to the rests of prey. The main feathery scavengers of African
savanna are griffarrots,
birds of green color with white spots under wings. These clever, but loud and
noisy birds gather to large flock, looking from above at saber-toothed predator.
They are armed with powerful black beaks, and front parts of head and breast
are featherless at them, as at vultures of human epoch. Griffarrots can’t hide
their own presence at all, and other carrion devourers fly, being guided for
their voices.
On trunk of tree chosen by griffarrots two raven-sized birds jump dexterously.
At first on this tree one bird of this kind has appeared only, but then the
relative had joined it. As against parrots, these birds keep silently. Their
back and wings have the same green color, as at parrots, but colouring of other
parts of body is strictly different: plumage of these birds is grey with a glaucescent
shade. And on the background of green plumage of parrots these birds stand out
due to bright orange-coloured mobile cops. Very characteristic manner of flight,
straight pointed beak and paws, on which two toes are directed forward, and
two others turn back, indicate these birds are woodpeckers. However they appeared
not casually among the birds waiting for their turn near a killed animal. They
are interested directly with carrion, though woodpeckers, as against griffarrots,
wait for their turn with a kind of restraint. It is very original species, the
woodpecker adapted for feeding on carrion, named as bone-breaking woodpecker.
It is a breeding couple which keeps together for many seasons in succession
and searches for carrion in common. Woodpeckers do not like, when parrots start
to express aggression to them. Therefore, when one griffarrot raises its crest
and tries to drive them away, the couple of woodpeckers simultaneously demonstrates
pointed beaks to it, calling loudly and unpleasantly. When the small conflict
comes to end, bone-breaking woodpeckers start to clean feathers of each other.
They touch feathers on cop of nesting partner gently, glancing from time to
time to the carcass of ndipinotherium tormented by deadlynetta.
Loud wing flapping forces griffarrots to shut up scaredly, and frightened bone-breaking
woodpeckers have rushed under the covering of thick branch. One more bird similar
a bit to them by color of plumage, but many times larger perched on tree trunk
above them. It has the same grey plumage on body, but wings are brown with two
large yellow spots on each, and crest on head is bright red. It is one more
species of carnivorous woodpeckers of Northern Africa, large griffon woodpecker.
It has featherless face like griffarrots, and it indicates that the bird counts
not only on rests of the carcass. Among other birds griffon woodpecker behaves
confidently and imperiously. Even having wings folded it reaches one meter length,
and its strong pointed beak represents a terrible weapon using resolutely and
neatly by this bird. When griffon woodpecker skips along the large branch of
acacia, its leaves shake appreciably. Griffon woodpecker is not going to wait
until deadlynetta will finish its meal, but now it does not feel like sure enough
to challenge to the top predator of savanna.
Griffon woodpecker raised head, and cried loudly. Its voice, loud guttural call,
echoed far in vicinities. And in some seconds the same call returned as an answer.
Some minutes passed, and during this time griffarrots presumed to themselves
only silent squeaky sounds, and the couple of bone-cracking woodpeckers had
gone down almost to the basis of tree trunk. And soon one more feathery giant
of such kind perched on tree. Birds welcomed each other, raising bright red
cops, and then looked downwards, where deadlynetta feasted, together. The couple
of large griffon woodpeckers represent the force needed to be taken into consideration
even by large mammalian predator.
While deadlynetta is feeding on ndipinotherium’s carcass, scavenging birds wait
modestly for their turn, glancing cautiously on a couple of griffon woodpeckers.
But these birds do not wish to wait anymore, and the couple of giant woodpeckers
flies down simultaneously from the tree and perch on carcass. Deadlynetta eats
meat from the softer part of carcass – internals and hips of prey. And woodpeckers
try to get meat on shoulder of killed ndipinotherium. Birds peck through skin,
and by turns pull out by beaks pieces of meat and swallow them greedy, pulling
head and neck. While birds feed in the distance from deadlynetta, they do not
affect this predator. But giant woodpeckers gradually come nearer to it, calling
abruptly and raising red cops. Deadlynetta perceives their aggression as seriously,
as it can: many years ago due to inexperience it nearly had lost an eye, trying
to defend the prey from these birds. But in hope to drive woodpeckers off deadlynetta
opened wide its mouth and had begun to roar loudly. Its actions, however, had
an opposite effect: griffon woodpeckers stretched their wings, had cried loudly
and started to make jerky lunges by beaks aside a predator. Their beaks represent
a terrible weapon, and deadlynetta does not wish to test its force in second
time. Therefore the predator recedes gradually and starts gnawing the back part
of hip of the carcass. And griffon woodpeckers have started to rummage in torn
off abdominal cavity of ndipinotherium, pulling out pieces of meat. And only
grieving swallowtails have not reacted absolutely to “change of power” at the
carcass. They have still continued to be sated with blood and meat juice, not
paying attention to griffon woodpeckers. Seeing a success of couple of griffon
woodpeckers, other birds have gradually grown bolder. Some griffarrots flied
down on the ground, but they do not dare to approach to the carcass and keep
behind the predators. When griffon woodpeckers had started to attack the deadlynetta,
bone-breaking woodpeckers had risen as high as possible on tree trunk. They
do not hasten, but wait for their turn patiently. Nobody will take away their
part of prey, because there is a little number of animals which are able to
eat the same food as these woodpeckers eat.
Deadlynetta with long saber-like canines can eat only a small part even of large
prey – only the softest parts of carcass. It eats only meat on back part of
prey body, and eats also a part of soft intestines. Saber-like canine is an
effective thing for hunting for large animals. But simultaneously it is a very
fragile weapon and the great disadvantage during the meal. Therefore deadlynetta
never tries to chew meat from ribs of its prey, being afraid to break its canines.
When griffon woodpeckers had started to it drive away from prey, it has had
time to eat enough to leave the most part of prey to scavengers. Having swallowed
some pieces of meat, deadlynetta rises, stretches its body and walks away, wagging
its long tail. Now it’s a time for smaller carnivores to start their dinner.
When the predator had retired to bushes, the carcass of ndipinotherium almost
at once had disappeared under the cover of numerous bodies of animals which
had waited for their lucky hour. Grieving swallowtails had instantly flied up
from the carcass and began flying out gradually. But numerous griffarrots had
started to chew meat from bones greedy. Their hooked beaks tear skin of ndipinotherium
and cut off even firm tendons. And in the middle of their flock, as if certain
demons, huge griffon woodpeckers tower. These birds keep among griffarrots confidently
and aggressively due to their large size. Griffon woodpeckers can eat only soft
meat and are not able to gnaw it from bones. Therefore they push parrots aside
with undue familiarity, and sometimes make lunges using pointed beaks, forcing
parrots to give up the place on the corpse. These birds reach parts of carcass
where there is a meat not eaten by deadlynetta, and begin pecking it out. Griffon
woodpeckers live in couples at the extensive territory, and are very friendly
to each other. Therefore even during a sharing of prey they keep together. They
eat prey of large predators and consequently protect the territory from relatives
zealously. Their instinct of homeland protection is very strong, they even attack
smaller representatives of close species which are at least a little similar
to them in colouring. For this reason bone-breaking woodpeckers hide from these
giants on tree.
Among the scavengers griffon woodpeckers start feeding the first, and finish
their feeding also the first. They can eat only few parts of carcass, and make
it faster to outstrip others scavengers. Both birds peck meat greedy, and swallow
large pieces of it. Griffarrots have an experience and know that it is better
not to come close to these birds while they feed. Therefore they try to keep
a distance from griffon woodpeckers which feel themselves like dominants. When
one inexperienced young bird appears too close to griffon woodpecker, the giant
utters rolling guttural call and pointed beak clicks near the back of parrot.
This warning is quite enough for bird to keep aside. During the feast griffon
woodpeckers get terrible appearance: their featherless skin on head and neck
is splashed with blood, and these birds resemble any dreadful monsters. They
tear off large pieces of meat and swallow them entirely. These birds are rather
gluttonous and sometimes eat more meat, than is necessary for them. After such
feast griffon woodpecker is compelled to belch a part of swallowed food to fly
up. If the bird ate regularly, it does not suppose it and is always ready to
fly in air.
Having sated, griffon woodpeckers jump off from ndipinotherium carcass and clean
their feathers for some time, standing on the ground clumsily. Their plumage
is stained with blood, scraps of meat and even the contents of intestines of
ndipinotherium. Therefore, before to depart, birds are obliged to take care
to their plumage. Making series of flutters of some meters long, griffon woodpeckers
move to the next tree near which there is a shallow pit full of dry sandy ground.
It is a dust bath in which local animals take care to their wool or plumage.
Birds reach it and satisfyingly fall on the ground, raising a cloud of a dust
around of them. Scared by their approach, tiny lizard had jumped out of sand
and had disappeared in shadow of bush. Hungry griffon woodpecker could easily
catch it, but now both birds are full, and they are interested only with their
own cleanliness. Griffon woodpeckers willingly bathe in sand, throwing it on
themselves by movements of wings. Then they stir up, clean themselves a little,
and lay in dust again. Hygienic procedure lasts for a long time, about twenty
minutes.
Having cleared up their plumage, griffon woodpeckers fly up on tree. Having
caught against its trunk, birds stir up, cleaning the rests of dust from feathers,
and perch on trunk motionlessly for some time, having stretched wings and turned
backs to the sun. It is a kind of natural disinfection: the similar behaviour
had been characteristic for vultures of Holocene epoch. The similar habit of
life results in development of more or less similar features of behaviour.
Having sat under sun rays, both griffon woodpeckers fly up and in some minutes
disappear in thickets in several hundred meters from the place of a feast. All
the time while full griffon woodpeckers cleaned their plumage griffarrots ate
meat of ndipinotherium. Parrot beak fits excellently to cut sinews and ligaments
and to crush the gristles. These birds are not as specialized, as griffon woodpeckers,
and their share still includes many edible parts of carcass, when giant woodpeckers
fly off. Voices of feasting griffarrots attract their congeners, and already
some hundred birds surround the carcass of ndipinotherium. They behave very
noisy, and between individuals from different flocks fights take place frequently.
Hooked beaks of griffarrots help them to clear ribs of ndipinotherium of meat.
Due to efforts of carnivorous parrots the amount of meat on bones gradually
decreases. Bone-breaking woodpeckers waited patiently for this moment. They
do not apply for another’s share of prey, because they eat rather specific forage,
and not every other animal can get it. The couple of these birds flies from
tree, and joins the feast of parrots. Birds reach strong tubular bones of ndipinotherium
legs and start pecking the articular heads. Dense ligaments are broken easily
with impacts of pointed beaks, and bone-breaking woodpeckers start the destruction
of spongy heads of bones. It is also simple for making, and after short work
woodpeckers reach an internal cavity of the bone. Their favourite food, the
marrow, is hidden here. With the help of long tongues the couple of woodpeckers
licks off by turns a marrow from a humeral bone of ndipinotherium. But the bone
is long, and woodpeckers can’t reach the food hidden in depth. Then the female
of bone-breaking woodpecker simply perches on bone of animal and pecks an aperture
in it near to bone tip. Through it both birds continue licking off the marrow.
Then they move to rear leg of ndipinotherium carcass and repeat the same actions.
Birds will stay near the carcass, waiting until bones of two more legs of ndipinotherium
appear accessible due to efforts of other scavengers. But, until this moment
will come, they use one more source of food, also accessible not to everyone.
Skull of ndipinotherium is very strong. During the intraspecific duels males
use heads to strike a blow to the opponent. Attacking the female of ndipinotherium
and then eating the carcass, deadlynetta did not make any attempts to bite through
it, being afraid to break its canines. Beaks of griffarrots also do not fit
well for this purpose: birds can bite through a skull of small animal with the
only bite, but the skull of ndipinotherium is too large, and they can’t open
beak so widely. But the bone-breaking woodpecker easily solves this problem.
By strong impacts of beak one of birds opens a cranium, and the couple of birds
starts feeding on brain of killed animal. This part of prey belongs only to
them, and griffarrots do not try to take advantage of it at all.
When living in savanna, it is very favourable to be able to consume the rests
of predator’s prey. But the most important condition here is not to turn to
prey itself. But when having a chance, even prey lets slip no opportunity to
turn to a carnivore at least partly. Near the rests of ndipinotherium carcass
bushes move and some large animals come nearer to the carcass. In constitution
and size they are similar to bear, but are rodents actually. These ones are
mighty grasscutters, large,
but harmless inhabitants of savanna. In usual life they prefer to keep the distance
from deadlynetta, but they eat its prey very willingly, if have an opportunity
to do it.
Having stopped near the carcass of ndipinotherium, mighty grasscutters rear
on hind legs and start watching around and smelling air. In this group there
are seven adult rodents and three juveniles. If near the carcass any predator
is hidden, such demonstration of size and force would be rather impressive for
it. Even the lonely mighty grasscutter can be very dangerous adversary, and
the group is a force that must be taken into account.
Griffarrots have paid attention to appearing of these rodents and turned much
more quiet than usually are. And some most cautious ones had flied up on tree.
Bone-breaking woodpeckers also had stopped to regale themselves on brain of
dead ndipinotherium and started watching around, being disturbed. And mighty
grasscutters, having convinced in safety, come closer to ndipinotherium carcass,
scaring birds away. When they started their meal, all griffarrots had flied
up on tree, and therefrom began watching for enormous rodents. Bone-breaking
woodpeckers, on the contrary, have continued to regale themselves on brain of
ndipinotherium.
Mighty grasscutters eat the rests of meat and crunch when chew it off from bones,
and gnaw the gristles with great pleasure. Using strong incisors, they crack
the breastbone of ndipinotherium and eat its ribs, destroying and chewing both
bones and rests of meat. Muzzles of huge rodents are blood-stained, and at this
moment it is impossible even to think, that in other time these animals are
peaceful herbivores. Carrion eating is the compelled necessity: in this way
mighty grasscutters fill the protein shortage in plant food.
Bone-breaking woodpeckers feel obvious displeasure of nearby feeding of huge
rodents which obviously are stronger than these birds. And this condition of
birds is quite justified: one mighty grasscutter has come nearer to them. It
sniffed for some seconds, and then, uttering low throat growl, has risen on
hinder legs, and was lowered on all fours. Bone-breaking woodpeckers are scared
by such demonstration; they fly up and perch on trunk of tree growing nearby.
They obviously have nothing more to do here: rodents will not leave anything
edible for them. Having frightened bone-breaking woodpeckers off, the huge rodent
sniffs at an aperture in ndipinotherium skull made by birds. Then mighty grasscutter
opens its mouth widely, and cuts a skull of ndipinotherium with powerful incisors.
Uttering pleased snorting, it begins licking off the rests of animal brain,
and then starts flaying skin from head of dead animal. Its prize for this work
is a little amount of soft meat.
The feast of mighty grasscutters proceeds almost up to the sunset. After their
feeding from the corpse of ndipinotherium only the gnawed backbone and sacral
bones remain alongside with the rests of other parts of skeleton with pieces
of skin. While rodents were fed, scavenging birds gradually flied away, having
lost any hope to receive some more food.
Four-legged carrion devourers eat the most part of soft tissues on the corpse.
But, when they leave, on the rests of the carcass there is a lot of edible matter
for others animal – the largest bones, a significant part of skin with soft
tissues and the rests of fat on its internal side. Invertebrates came the first
to the sharing of deadlynetta’s prey, and they will leave it last, having left
only few remains behind them.
Above the rests of ndipinotherium carcass flies hover. They are very numerous,
and birds use their opportunity– they sweep through the swarm of insects, seizing
them in flight. Flies are the most important scavengers of savanna. Each fly
taken separately is a small and weak creature. But some tens of thousands of
flies represent something much more gluttonous, than even the sole deadlynetta.
Flies lay eggs on bones and a skin, and from them maggots quickly burst. These
soft-bodied creations let out digestive enzyme directly on meat and bones, and
then lick off the resulting “broth”. They are not stopped even with the beginning
of decomposition processes, because of which remains of ndipinotherium begin
smelling disgustingly. The circumstances driving other animals away can be regarded
by insects as an invitation to the dinner.
Thousands of white and yellowish maggots swarm on remains of ndipinotherium,
devouring everything edible. Among them brown and black beetle grubs creep.
Some of them eat the same, as maggots do, and others eat maggots. Maggots grow
very quickly. When the time of pupation comes, they fall from remains of animal
down, on the ground. Having dug itself, maggot turns to adult fly in some days.
But not all of them can complete their cycle of development. And the fault of
this is a tiny killer having dazzling bright dress.
Fat maggot creeps out from the cavity in ndipinotherium backbone and falls on
the ground. For some minutes it lays almost motionlessly, only slightly moving,
and then starts to dig a vertical mine in which it can pupate. But its destiny
will be quite different. Near the maggot the ground moves, and from it bright-green
spider with white spot on cephalothorax and noble silky shine of numerous hairs
on body appears. This spider rushes on maggot immediately, kills it with a bite
and hides in ground with its prey quickly. Near it one more spider of the same
kind appears. It seizes another maggot and also rushes back to its shelter.
This bright kind of spiders is cadaverophilous shining spider, the representative
of wolf spider family. Like free hunter, this invertebrate searches for prey,
not building any permanent traps. Bright colouring with metal shine signals
to other animal, that this spider has a poisonous bite. Bright-green spiders
are females. Males of cadaverophilous shining spider look differently and lead
the different way of life. They are spiders of ochre red with white tips of
front legs, and their length hardly reaches the half of female size. They creep
on bones of ndipinotherium or rummage in semi-decomposed skin of corpse, trying
to find small grubs, maggots and moth larvae. These spiders search for corpses
of animals by smell, and settle near them when the remains not eaten yet by
other necrophages start the decomposition. The carcass of ndipinotherium turns
to enormous lure for insects, and cadaverophilous shining spiders live for some
days, surrounded with abundance of food.
Many individuals of ndipinotherium species will not die with natural death,
but turn to prey of various predators. This is a quite natural state of affairs
in nature. Some ones will be ruined by famine and drought, and others by diseases.
In a nature the natural death is rather unusual event. But, while ndipinotheres
are strong enough to struggle with enemies and to resist to adverse environmental
conditions, they do it. Ndipinotheres represent a successful group of African
herbivores. The largest kind of these animals lives in savanna, and its smaller
relatives live in forests and mountains, only partly reaching the Southern hemisphere.
Ndipinotheres and flathorns wandering across savannas of Northern Africa represent
the evidence of evolutionary success of hyraxes, the group of primitive ungulates.
In addition to them, Africa is inhabited by other large descendants of hyraxes:
in swamps and mangrove thickets massive ipopos
prosper, leading semiaquatic habit of life. But inhabitants of savannas meet
them only casually.
Hyrax descendants have kept one interesting behavioural feature of these animals:
they do not spread their dung in savanna, but leave it in some strictly limited
places. It is difficult for combining with a way of life of large animals which
are compelled to move across savanna constantly, but nevertheless the original
compromise had been found.
In savanna huge fetid dung heaps are frequently found – these are traces of
the presence of ndipinotheriums. Such heaps occur in savanna mainly along the
routes used by herds of these animals within centuries. Every dung heap exists
for many months, and even for some years in succession and is constantly renewed.
It has not only purely utilitarian purpose: dung heap serves as an original
“bulletin board” for ndipinotheriums. Before adding their own manure to the
heap, animals sniff what other animals have left. By smell of dung animals can
find out each other even if herds, in which they live, did not meet for many
years. Also by smell they can determine a physical condition of each other,
estimate the physical condition of the contender or readiness of the female
to mating.
Around the dung heap ground is trumped and impregnated with urine plentifully.
Therefore in radius of three or four meters from it only few kinds of grass
can grow. But the heap itself is a place of a concentration of life.
The herd of ndipinotheres moves to one of such heaps. It is clearly visible,
that this dung heap was not visited by these animals for a long time: the top
layer of manure is dry and hardened like dense crust. In some places this crust
has shook, and from under it egg-looking caps of white color stick out. One
representative of the usual inhabitants of manure heaps grows in this way–it
is giant manure mushroom. Fruiting bodies of this mushroom punch manure crust
and expand on manure heap like huge umbrellas of half-meter height, white with
reddish-brown underside.
Manure serves as a house and food not only to mushrooms. When ndipinotheriums
have come nearer to heap of manure, from its surface the cloud of flies has
flied up, and the small spider has jumped out from any shelter, and has disappeared
in grass. Adult ndipinotheriums started to sniff at dried manure, and to devour
simultaneously fruiting bodies of giant manure mushroom with apparent pleasure.
Having eaten large mushrooms, one ndipinotherium has picked up manure crust
with an incisor and has thrown it aside. Under it young fruiting bodies of giant
manure mushroom were found out. The animal has cautiously grasped by its lips
some young fruiting bodies, not fully developed yet, and has swallowed them
with pleasure.
Having received all necessary information and having eaten all mushrooms, ndipinotheres
one by one turn to manure heap by bottoms, and fresh layer of manure falls atop
of dried up crust. Animals replace each other and walk aside, while their congeners
evacuate their intestines. After last member of herd has finished this occupation,
ndipinotheres have walked away. These animals are in constant movement - if
they will stop for a too long time in any area, their stay can become destructive
for vegetation.
No one of ndipinothereshas noticed, how from the back of one animal large beetle
with golden metal shine has flied down and landed on fresh manure. Another animal,
however, has felt something another – it had been stung painfully by a horsefly
of huge size.
Beetle and horsefly are representatives of only two species belong to original
community of invertebrates, which develops on manure heaps of ndipinotheres.
Manure of large herbivores is rather rich source of food for ones able to use
it. It contains a plenty of undigested vegetative parts - fibers, seed shells
and non-chewed whole seeds. Abundance of this food source stimulated the evolution
of the animals using it at various stages of life cycle.
Large blood-sucking fly makes many troubles to ndipinotheres. When animals graze,
they are attacked by ndip horsefly – one of the largest blood-sucking insects
of the Earth. This horsefly up to 45 millimeters long tries to suck blood in
places, where ndipinotheres have the thinner skin. It attacks groin and axillary
areas of beasts, and also bites their heads and ears. The places bitten by this
light grey giant itch vastly, therefore animals are very anxious if there are
too many horseflies around. Ndipinotheriums lacks tale like horse or cow, therefore
they can’t drive these tiresome insects away from themselves. But birds help
them to cope with this trouble. They perch on backs of these animals and overtake
horseflies in dexterous rushes. But not all horseflies turn to their prey, and
many of them succeed to give rise to new generation.
Female of ndip horsefly searches for dung heap. It flies up high above trees,
trying to find out the stream of air carrying the traces of smell which could
seem disgusting to any other animal. In the morning this female had a successful
feeding on the body of one ndipinotherium, had dexterously evaded from a certain
bird which tried to pursue it, and then had spent for some hours in shelter.
At this time the consumed blood was digested, and in its organism the portion
of eggs which need to be laid in ndipinotherium manure had ripened. At last,
a weak trace of a desired smell had reached its receptors, and flight of ndip
horsefly female turned more purposeful and fast. Having run about one kilometer,
the insect finds a source of smell – a heap of rather fresh manure left no more
than one day prior to its appearing here. Horsefly female is not the first guest
here: many insects live near dung heaps permanently. Numerous flies of various
colors and sizes sit on manure, sucking drops of liquid from it. But they fly
up, when ndip horsefly female flies by above them – they have real reasons to
be afraid of insects of such constitution. Heavy horsefly female makes some
circles above a heap of manure, analyzing the smell. At last it finds suitable
place, being guided by signs known only to it. Having landed on manure, horsefly
female lays an egg quickly, having stuck the tip of abdomen deep in manure.
Then it flies up and searches for another place, where its action repeats. Female
repeats this maneuver for one and a half ten times – it should spread its larvae
as widely, as it is possible, to prevent their meeting. Ndip horsefly larvae
are active predators and may turn to cannibals at the opportunity. Therefore
the superfluous density of settlement of horsefly larvae is negative for survival
of the species.
While one ndip horsefly female had been occupied with egg laying, the another
female of the same species had appeared above the manure heap. It also searches
for a place for egg laying. But it is simultaneously dangerous for two females
to meet each other on manure heap – one of them should search for any other
place for its eggs. Otherwise larvae of two different females will compete,
and, probably, hunt each other. Therefore horsefly female flied the first reacts
immediately to appearing of congener. It flies up and both females meet in air.
The true air fight takes place above manure heap. The first female of ndip horsefly
tries to drive away the second one from manure heap: it keeps between the heap
and the second female, rushing towards it, when it tries to approach. The second
female does not hasten to surrender: it speeds up quickly and tries to come
off the persecutor. But it is perfectly visible to the first female: at the
body of horseflies of this species there are longitudinal strips of hairs reflecting
ultra-violet light, and in clear sunny day these horseflies distinguish their
congeners from the great distance. The first female does not hasten to rush
to pursuit the second one: it prefers to stay near manure heap. Therefore, when
the second horsefly female departs, the first female continues the interrupted
affair. It lays some more eggs in manure and flies out. The instinct orders
it to search for another manure heap in order to prevent her posterity to suffer
from consequences of overpopulation. But, when it flies out, the second female
of the same species appears above manure heap –it is that one which was banished
by the first female. Now it lays eggs in the same heap without any problem.
Maybe, when it will fly off, some more ndip horsefly females will come here.
Thus, the cannibalism among their larvae turns to inevitability.
The second horsefly female as carefully, as first one did, chooses a place for
laying of eggs, and leaves eggs one by one at certain depth in different parts
of manure heap. When it lands to lay the last egg, it casually touches thin
silk thread, which is stretched along the dried up manure crust.
This casual touch turns an accident for the horsefly female. In several centimeters
from it the masked entrance to vertical mine opens suddenly and therefrom the
small spider jumps out. In one jump it overtakes horsefly female, puts a fatal
bite to it and moves backwards to the mine, dragging off a killed insect. On
a twist of fate, the first ndip horsefly female had laid an egg only in several
centimeters away from the place of a little drama. If it would touch another
string of spider web stretched from the edge of spider mine, its fate would
be the same.
The horsefly has fallen a prey of one of permanent inhabitants of manure heaps
– of manure shining spider. It is a close relative of the species eating insect
larvae on corpses of animals. However distinctions in colouring and habit of
life prevent the confusing of these two species. The successful hunter is a
female spider. Its colouring resembles something like a decaying piece of coal:
front part of its body is brown with black specks, the most part of a body is
crimson-red with metal shine, and only abdomen tip is orange. Hairs covering
the body of this spider have silky shine that makes this spider even more beautiful.
Female of manure shining spider is a secretive creature. It prefers to hunt
from an ambush. This spider digs out in fresh ndipinotherium manure a vertical
mine, which depth is approximately four times more than its length. Walls of
hole have a silky web cover, on which the hole owner moves like along the ladder.
Near the edges of the hole the web forms a continuous ring from which strong
thin alarm strings stretch. When insects touch them by legs, the spider jumps
out from shelter and grabs its prey. To mask the entrance the female of manure
shining spider covers it with easy and inconspicuous for the stranger’s look
cover. For this purpose it plaits a piece of dry manure with its web and pastes
the rests of plants or other easy subjects from the side. Being in a hole, the
spider takes the cover with front pair of walking legs, and grasps insects with
pedipalps.
Female of ndip horsefly had casually touched by its leg one of multiple signaling
strings stretched from the mine of manure shining spider and had been attacked
then. Having killed it with the sole bite, the spider had sucked out the horsefly
dry and then had thrown out empty exoskeleton outside, having raised slightly
a cover of the mine.
Manure shining spider in not only species digging holes in manure heaps. In
thickness of semi-decomposed and fresh manure numerous species of insects dig
their tunnels. The widest holes lead to the depth of manure layers, are directed
vertically and reach the depth up to 50 – 60 cm. They had been dug out by grubs
of jumbo dung beetles–very large dung beetles of Neocene epoch. These grubs
build vertical mines in manure, and after the addition of new layers of manure
from above they dig a hole through them, moving up all the time. Grubs of jumbo
dung beetles are remarkable because of their huge size: their length is up to
20 centimeters. These creatures continuously devour manure, being generously
supplied with it by ndipinotheres, which “register” their presence at the manure
heap. The hole represents not only a refuge, but also a trap: jumbo dung beetle
grub also willingly devours worms and larvae of other insects falling to its
hole.
Adult jumbo dung beetles are magnificent insects. Males of this insect species
are considerably larger compared to females because of the presence of long
horn on pronotum, which is bent forward. It is difficult to overlook these insects:
manure seems too unsuccessful frame for such magnificent creation of nature.
Elytra of jumbo dung beetle male shine like polished gold in sunlight, when
this beetle waits for appearing of females on manure heap, and pronotum, horn
and head sharply contrast with this shine because of black color with noble
“gray” of numerous white bristles. Male doesn’t hide itself: due to the size
it has no reason to be afraid of the majority of birds living in savanna. Staying
at the top of manure heap, it not only looks for female, but also declares to
other males that this territory is occupied. But, as a rule, the contender arrives
much earlier, rather than female.
The appearing of another male of this kind of beetles is not only perfectly
visible, but also is audible long before both beetles will see each other. Massive
male, attracted with a smell and shape of manure heap, flies to it from outside.
But, having flown up closer, it notices the owner of the territory that seemed
so attractive to it. The owner male does not hasten to fly up: these beetles
arrange combats on the ground. But it opens elytras lightly and dark blue shine
of its abdominal segments turns appreciable. It does not stop the applicant,
and it lands on manure heap. Such behaviour represents an obvious challenge,
and the owner beetle creeps fast towards the impudent contender.
Males meet each other at the slope of sun-backed manure heap. They both are
the same: both beetles are well-developed physically. Nobody is going to recede
from the territory without fight. And both huge beetles, scaring away flies
and smaller beetles, hasten towards each other to be seized in fight. Males
of jumbo dung beetle collide head-on, and try to push each other from the heap,
jostling by foreheads. The owner of territory has the better position – it creeps
on slope higher, than the applicant, and it is easier for it to restrict the
massive contender. When bugs jostle each other by foreheads, rather loud sound
is heard. But at this moment the applicant applied a trick casually or intentionally:
it hooked horn of the owner beetle by its own horn and had hung on it. Being
unable to keep slope of the heap, both beetles had fallen down the ground. Having
uncoupled, they almost simultaneously had flied up, and had met again already
at the top of manure heap. And their battle got rolling even more intensively.
The owner beetle had tried to pick up the applicant for its territory by horn,
but its opponent had managed to evade and push it away by leg. Having turned
around, it had tried to counterattack, and it was almost successful: it had
hooked the owner beetle by horn, and almost pressed it against the horn growing
on pronotum with the movement of head. These two horns form strong tongs, and
the beetle cannot get out of their capture. But the pronotum horn of applicant
beetle had only slipped across the edge of owner beetle’s elytra, and tongs
had slammed empty. On the contrary, the owner beetle had managed to apply the
same maneuver more successfully. Its horn had picked up the applicant under
thoracal segments, and horn from pronotum had strongly rested directly against
the crack between elytra of the opponent. When it had risen, legs of the applicant
lost the contact with the surface of manure heap, and it appeared completely
helpless. The owner beetle held it clamped between its horns for some minutes,
and then had slowly weakened its clamp. Its applicant had fallen out, and had
slid down from the manure heap. Having turned on back, it moved by legs in air
helplessly for some minutes before it could hook by leg against the grass stalk
and turn over. It had stretched wings, had flied up heavily and vanished soon
from the sight. And the winner male, having ratified the right to the territory
once again, proceeds the waiting for females.
Jumbo dung beetle male knows what must happen before even one female will appear
on manure heap. For this purpose ndipinotheriums must come here and make what
they usually do in such situation. Therefore the beetle waits patiently.
Booming sounds of steps of the whole herd of huge animals force inhabitants
of manure heap to be disturbed. Grubs of jumbo dung beetle hastily go down to
the bottom of their holes, and manure shining spiders, on the contrary, leave
holes and creep away to the grass. The approach of ndipinotheriums means the
coming changes in life of small inhabitants of manure.
Animals surround a heap of manure, and first of all sniff at it. And jumbo dung
beetle male flies up with loud buzz, forcing one ndipinotherium to recoil frightenedly.
It keeps in grass away from herd, while manure heap is replenished with a fresh
layer of manure. And when ndipinotheriums are going to leave, jumbo dung beetle
male hears a sound for which it waited for rather long time. This hum of a special
timbre can mean only one thing: the female has appeared on heap of manure. It
had not arisen from nowhere: females of jumbo dung beetle travel right on bodies
of ndipinotheriums. They behave so because they need exclusively fresh manure
of ndipinotherium for egg laying. And the simplest way of receiving it is the
staying on direct source of manure, on the animal. Also jumbo dung beetle females
are large insects, therefore they are compelled to be hidden from birds on stomach
or on inner side of legs of animal.
Female of jumbo dung beetle lays eggs in fresh ndipinotherium manure hasty.
It lays up to ten eggs in every manure heap, distributing them in heap in regular
intervals. And right after egg laying it is ready to pairing again. Jumbo dung
beetle male knows it perfectly. Therefore, when ndipinotheriums have left, it
has quickly flied up, and has quickly found a smell of female in pungent smell
of manure. While female was engaged in egg laying, male kept beside, protecting
it against other males. But, when last egg was laid, male moved directly to
the female, displaying itself. It started walking near the female, having risen
on all legs to seem larger. And then fast pairing has followed, and male has
abandoned the female. The instinct orders it to wait for females on heaps of
manure which were not visited by animals for some time. And female flies along
the odorous trace of the herd of ndipinotheres which have delivered it on this
manure heap. It will find these animals in some hours, and will travel on the
body of one of these animals for any time –right up to new manure heap. And
there, in absolutely different place, it will lay the eggs fertilized by this
male.
When ndipinotheriums have left manure heap, its inhabitants have started to
come back to habitual life. The pungent smell of ndipinotherium manure has involved
thousands of flies, and they cover the surface of manure like a certain live
carpet. Flies lick off greedy the drops of moisture exuding from manure. Near
to them, however, light-winged and fragile butterflies of several species feed.
These insects also do not refuse to taste so unattractive “regale”, and willingly
push their proboscises into manure. For them it is a source of mineral substances,
but not a basic food.
But insects represent a food source for other inhabitants of manure heap. Female
of manure shining spider climbs up the heap of manure with quick jumps. At this
moment it is not interested in insects hovering above it. This spider hunts
from an ambush, and it should make new shelter as soon as possible, because
now its former home is buried under tens kilograms of manure. The building proceeds
quickly: female chooses a place at the border between fresh and dried up manure,
and starts digging a hole. It uses the back pair of legs on which a kind of
shovels just for this purpose is developed. Spider female digs a hole, immersing
the body into substratum back first and raking manure forward from under the
abdomen. At this time it behaves very intently, and turns an aggressive pose
when birds and even butterflies fly by above it. While it does not have hole,
its only means of protection is its strong poison. In half an hour of hard work
the hole is already dug out approximately for two lengths of spider’s body and
it becomes much more difficult to throw out manure lumps. Now female bears out
pieces of manure one by one and disappears in hole quickly. It works very quickly
at the surface of heap, moving by jerky jumps. At this time its body covers
sparkle beautifully in sunlight.
Approximately in two hours after the beginning of work the new hole is ready.
Last stroke in building is the smoothing of walls which the spider makes with
the help of two back pairs of legs. Now female begins taking care to itself.
On palps of this spider the original “combs” of rigid bristles are advanced,
with their help the spider brushes off from itself the stuck particles of manure,
and at the same time removes from itself mites which inhabit manure heaps plentifully.
After the hole is made, female of manure shining spider upholsters walls of
shelter with thin web grid on which it is more convenient to creep out of hole.
And along the edge of hole it stretches alarm threads. For this purpose female
makes fast jumps out from the hole, pastes the tip of thread to the ledge on
surface of manure, and with another jump it comes back to the hole, simultaneously
stretching thin web string to an entrance. It repeats this operation for some
times, and soon the hole is completely surrounded with alarm strings. The ends
of these strings are connected to web grid on edge of the hole. Holding legs
on web, the female of manure shining spider can control everything happening
in vicinities of its hole. Finishing the preparations for hunting, female unites
some pieces of dry manure by web strings, making cover for its hole. When the
hole is closed, only very attentive sight can determine the presence of the
hidden spider.
Manure heap is full of eggs of various species of insects – flies, horseflies
and beetles. The majority of these eggs will be destroyed by other inhabitants
of manure –by tiny, but uniquitous mites. They are small, but thereis a great
number of them, and they breed very intensively. In fact, each insect landed
on manure heap, carries away on its body nymphs of these mites. Due to such
way of settling mites live in every manure heap. Nevertheless, despite of presence
of such enemies, from the part of eggs larvae burst anyway, and their number
is quite enough to provide the reproduction of species. Otherwise natural selection
must reject such life strategy a long time ago.
From the eggs laid by ndip horsefly females blind soft-bodied larvae burst.
They resemble worms and have transparent body covers through which their internals
are clearly visible. But, despite of such appearance larvae are not as defenseless,
as they look. On the contrary, they are the most dangerous predators of manure
heap. Their mouths are armed with chitinous hooks with which help they grasp
and keep prey – other inhabitants of manure heap, including their congeners.
In manure heap larvae of various ages live, and there is a furious and uncompromising
struggle between them. Ndip horsefly larvae rummage in manure, digging narrow
passages. They easily penetrate into holes of other inhabitants of manure, and
can pursue them in their own tunnels, being guided by keen sense of smell. But
they succeed to catch prey not always.
Ndip horsefly larva dug a hole in thickness of manure. For this purpose larva
contracts ring muscles of forward segments of headless body and stretches the
front part of body forward. And then it moves forward by contraction of longitudinal
muscles, expanding the tunnel. And just at the moment of larva body contraction
large piece of manure falls off unexpectedly fallen from its tunnel from below.
Larva has continued to move forward blindly, and has fallen out of the collapsed
tunnel downwards. It has got into mine-like vertical hole of jumbo dung beetle
grub, and has fallen down right on head of the grub staying in the bottom part
of hole. Horsefly larva has felt the danger coming from the giant which it had
fallen down. It began desperate wriggling, and even has tried to attack jumbo
dung beetle grub. But its mouth hooks only slipped powerlessly over hard and
smooth armour of head capsule of grub. But the jumbo dung beetle grub itself
has decided not to miss an opportunity to have a meal. It has opened mandibles
and attacked emphatically. Seized horsefly larva started wriggling convulsively,
but mandibles of dung beetle grub literally cut it half-and-half. When last
spasms of horsefly larva finished, grub started feeding. Horsefly larva has
almost no firm parts, and it had been eaten without any rests. And grub has
turned to slow creature again.
Dung beetle grubs are not specialized hunters. Their food is manure, and they
eat other animals, if such opportunity will appear. But other species of animals
living in manure heaps of nipinotheriums are much more skillful in hunting other
animals.
Thin web threads stretch along the surface of sun-dried manure. They lead to
the common center, to edges of a hole of manure shining spider. Hole is covered
by cap; therefore it is difficult for distinguishing at the background of manure.
And nothing suspecting insects can feed and creep in dangerous closeness from
shelter of deadly enemy. On manure heaps numerous flies gather, and they may
fall prey for this spider more often.
Large fly with shining body of green color lands on manure very close to spider
hole. It creeps on surface of manure and casually touches the stretched web
string by one leg. But for some reason nothing especial happens: spider does
not appear from the hole. When another fly touches another web string, there
is also no reaction for it. Usually the spider, even full, at least creeps out
from the hole in reply to such touches. But now it does not react. The explanation
is very simply: there is no clear separation to predator and prey in nature,
and now the predator turned to prey in its own home.
Larva of ndip horsefly had attacked manure shining spider. It has dug a tunnel
to spider’s hole and attacked it, getting sink its hooks into its abdomen. Spider
appeared trapped in its own dwelling – it simply has no free space to turn around
in hole to deliver poisonous bite to its enemy. Therefore horsefly larva could
eat through spider’s abdomen without any obstacles. Within several hours larva
eats it slowly in its own hole, and as a result only empty skin rests from the
spider.
Tropical and subtropical latitudes of the Earth are the inhabited area of special
group of insects without which processes of decomposition of organic matter
would go absolutely in another way. Termites, uniquitous and absolutely omnivorous
creatures, are very diverse in areas of climate suitable for them. In African
savanna one species of termites, dung termite, is specialized in cleaning of
manure of large animals. Work of these insects is imperceptible from outside,
but inhabitants of manure heap feel it from within. Dung termites penetrate
manure heap with tunnels, in which working individuals fill their intestines
with manure to carry it away to the colony. The foraging tunnels made by them
are temporary constructions. They gradually fall, and manure heap sinks because
of it. Great work of termites is practically invisible from outside: these insects
with tender body covers do not appear on the ground surface.
Working termites are perfectly adapted for carrying of forage to the home of
the colony. They can do it in two ways. First, working termites simply eat manure,
filling extensible intestines with it. Because of it their abdomen gets almost
spherical shape. And, second, termite not only eats manure. The insect sticks
into tunnel wall its flattened head acting like a shovel. Moving back, insect
drags off the lump of manure on its head. Thus, working individuals of dung
termite can bring to their nest much more food in comparison with their own
weight, rather than working individuals of other species.
Due to efforts of working individuals of dung termite the network of tunnels
inside the manure heap extends. But working individuals are the first ones endangering
attacks of predators. There is a great number of them living in manure heap,
therefore alongside with working individuals of dung termites in their tunnels
there are larger soldiers. They are almost twice longer than working termites,
and also have very large head with strong mandibles. These individuals defend
nest and workers against various predators, but their help not always takes
place in proper time. Termites should be afraid of all animals larger than they
are and even occasionally display the interest to food of an animal origin.
Giant grubs of jumbo dung beetle eat termites with pleasure entirely, right
with the contents of their intestines.
Grub of jumbo dung beetle scraped slowly the wall of vertical hole by mandibles,
eating manure with microscopic fungi which sprout on its surface in conditions
of high humidity. But this occupation was interrupted by the lump of manure
which has fallen from above. And together with manure the worker of dung termite
has fallen down into the hole of the grub. It has already filled its abdomen
with manure and consequently appeared too slow. If it wouldn’t gather a portion
of manure, it would easily escape, having crept up the wall of the hole. But
now it represents easy prey for the grub. It has seized termite body and began
chewing it slowly, not paying attention to desperate attempts of it to escape.
But it is too soft to render even the least resistance to grub’s mandibles.
In some minutes the hard head capsule of termite has crackled in grub’s mandibles,
and its dinner was finished. Only the slight smell of the perished working termite
is felt in its hole for a short time.
This smell has drawn attention of the soldier termite. Blind, but well-armed,
the soldier protects working individuals, and the smell of the troubled termite
causes in it the reaction of attack. The large-headed soldier runs in tunnel
and quickly reaches its end – the place where the working termite was broke
in a hole of jumbo dung beetle grub. The soldier feels the smell of other live
creature mixed with a smell of flesh of killed termite, and the instinct dictates
it the only suitable answer: the attack. The soldier termite moves its antennae
in air, trying to determine a location of the grub, and then splashes a jet
of liquid in direction of the grub. Having got on body cover of the grub, this
liquid instantly turns to viscous glue. Such way of attack is very effective
against small and long-legged insects or spiders, but it is obviously insufficient
against large grub. The soldier termite alone cannot stop large strong grub
– it easily tears sticky fetters.
Jumbo dung beetle has to feel the action of dung termite weapon on its body
– its development lasts for one year, and for it has to face these insects for
many times. It has very effective means against warrior termites –it is a sticky
emetic mass which grub is able to spat to the distance up to 20 – 30 cm. It
is a fine weapon against termites, ants and small predators from among reptiles
and mammals.
In some minutes some more soldier termites came to help the first one, and they
have started to shoot glue to jumbo dung beetle grub altogether. The situation
began more difficult: grub has felt its mandibles turned to move hardly, stuck
together with termite secretions. And it started the emphatic counterattack.
Grub has swallowed some portions of air and then with jerky contraction of muscles
has cast out a jet of smelly foam to its attackers. The spittle has precious
hit: some soldier termites had been pasted to an opposite wall of the gallery,
thrown back by the spittle of the grub. Only ten minutes later they managed
to free from emetic mass thrown out by the grub. It has conceived one more undoubtedly
positive effect: gallery, in which dozens of termites scurried, had become empty,
and nothing prevented the jumbo dung beetle grub to lead the former measured
life.
Termites are tireless builders: having abandoned the gallery which had so unexpectedly
led to the hole of large grub, they immediately begun to dig a parallel gallery
aside. There is a great lot of such galleries in manure heap. Via them the population
of large termitary located nearby is supplied with food.
Termites do not love sunlight and dry air on the ground surface. Therefore they
are compelled to show permanently the building skills for maintenance of normal
vital activity of the colony. Thousands of working individuals of dung termites
dig galleries to places where flathorns and ndipinotheriums “register” their
presence. The colony of termites, however, lives in traditional way, inhabiting
the termitary, which represents the architectural masterpiece equipped with
ventilation, thermal regulation and humidifying system. Sun can heat the top
part of the settlement of dung termites and burn it up to ceramic hardness,
but literally in several centimeters under it the atmosphere of termitary is
pretty humid and has a temperature optimal for life of insects.
Galleries of dung termite are similar to a motorway of human epoch. Along them
two streams of insects constantly move – working individuals with empty intestines
hasten to manure heap, and in opposite side hardly loaded relatives slowly move,
carrying in intestines and on flat heads loads of manure which becomes food
for other inhabitants of the colony. Sometimes in gallery termites of the soldier
caste appear– large-headed creatures armed with strong mandibles and hypertrophied
salivary glands which emit sticky substance stiffening in air. Gallery has smooth
vaults; along them termites also move. These individuals are smaller, rather
than workers are, and they are only nymphs of medium and advanced age. Their
abdomens are filled not with manure, but with water. They return from a deep
waterhole tunnel, which comes down to five-meter depth to the source of water.
Having drunk water and having filled an abdomen with it to the full, these individuals
creep to nest and galleries. Creeping on walls and a ceiling of gallery, these
insects belch drops of water and place them on roughness of walls. Evaporating
water humidifies air and makes it suitable for life of termites. But not only
termites use these galleries.
In darkness among termites strange creatures creep. Fat and soft, they are similar
a little bit to wood lice, but they have only six legs. These are insects, distant
relatives of termites. In fact, strange inhabitants of termite galleries are
termite-loving cockroaches, commensals in a colony of termites. Life in the
conditions of protection from enemies had transformed them to original animals.
Termite-loving cockroaches have soft and thin body cover and their wings disappeared
completely. These fat and short-legged creatures eat manure and do not harm
to termites. Sometimes they are quite numerous – in galleries of a large colony
there are tens of these insects.
The gallery is a safe place for its inhabitants, but sometimes rather unpleasant
unexpectedness happen, caused by vital activity of other inhabitants of manure
heap.
The stream of working termites moves in gallery in both sides between termitary
and manure heap. But unexpectedly from the ceiling of gallery some little lumps
of grounds fall, and termites rush away panic-stricken, breaking the regularity
of movement. The originator of turmoil is large ndip horsefly larva. It has
reached the size maximum for this species and is ready to pupate. Now it simply
aspires to leave manure heap full of its gluttonous congeners and to pass the
metamorphosis in safety. Larva simply dug a tunnel to the depth, and had casually
fallen into the gallery made by dung termites. Now this creature wriggles at
the bottom of gallery, having almost completely blocked it. Even preparing to
the metamorphosis, this larva has not stopped being a dangerous predator. Therefore
termites evacuate hastily to walls and ceiling of gallery, and soldiers hasten
to the place of occurrence of this monster. They surround horsefly larva and
start simultaneous shooting to it with secretions of salivary glands. Jets stick
to the larva body and stiffen on its cuticle as long viscous strings. There
are many soldier termites there, and they immobilize the larva properly. But
this creature is dangerous, being alive. Therefore, as soon as larva stopped
moving violently, into its body from various sides mandibles of soldier termites
stuck. They quickly kill it by stings, and creep away soon. These insects do
not eat food of animal origin, but successfully exist, eating indigestible cellulose
and mammalian manure. But termite-loving cockroaches, neighbours of termites,
are less selective. When danger is over, these insects have started to gather
around the prostrate predator. They are unpretentious, and easily change their
diet from manure to carrion. Mandibles of cockroaches start tearing larva cuticle
and reach its soft and appetizing interiors. Glue of termites has dried up and
does not prevent cockroaches to feast. Approximately in one hour they destroy
horsefly larva almost completely, having left only its firm mouth hooks. These
rests will be removed from the gallery by working termites, the hole in ceiling
will be closed up, and the next day a place where the larva intrusion had taken
place, will not differ in anything from other parts of gallery.
As evolution proceeded, termites have received a considerable benefit, having
developed the symbiosis with special flagellates living in their digestive system.
Due to these protozoans termites have an opportunity to eat and to digest successfully
a forage containing a plenty of cellulose and completely unsuitable for food
to majority of herbivores. This feature gives these insects an opportunity to
avoid a competition. Working individuals of dung termite return from manure
heaps burdened to the full. Their intestines are filled with manure, and cuticle
between segments of their abdomens had stretched utterly and is almost ready
to burst. In addition they bear a significant amount of manure on flat heads.
All food brought to the nest becomes the property of a colony immediately. Nymphs
of various ages get on the body of such worker, and eat manure directly from
its head, clearing at the same time body of working individual. After this manure
is eaten, the still hungry nymphs start touching by their antennae to mandibles
of working termite. In reply to such stimulation termite belches a portion of
the swallowed manure which is immediately eaten by nymphs. Some nymphs start
tickling by antennae the area of hindgut of working individual and eat semidigested
food appearing from anus of termite. Probably, it can seem unpleasant from human
point of view, but such way of feeding looks quite natural for termites. Working
individuals carry food to the nest and share it with other individuals, digesting
it by the whole colony according the traditional termite mode. Ndipinotherium
manure, containing a great per cent of vegetative matter, passes through the
alimentary canal of insect and has time to be digested only partly. Therefore
termites eat each other’s feces in succession, assimilating all nutrients from
it. Almost hundred-per-cent efficiency of digestion of food is reached this
way.
Termites are not predators, but it is better to any animal not able to coexisting
them not to get inside of their building at all. Termites of soldier caste have
very dangerous sting, which kills even small mammals casually appeared in termite
colony. Nevertheless, the creatures succeed to get on with termites prosper
in their buildings. Termite-loving cockroaches belong to the number of such
lucky beggars. These insects survive in termite nests, changing the secretions
of special glands to semidigested manure, bodies of casual victims of termite
attacks and reliable protection from the side of termites.
The secret of survival of termite-loving cockroaches is hidden in remarkable
features of their antennae. Each antenna of this cockroach is separated into
two halves – its basis is thick and rich in glands, and top part is thin and
sensitive. In the bases of antennae the glands are located, secreting the transparent
liquid – a regale desired for dung termites. Secretions of termite-loving cockroaches
have special physiological influence on termites – they cause in them a condition
a little bit similar to feeling of pleasure. Therefore cockroaches rarely succeed
to be engaged in the affairs alone. Usually these insects are regularly visited
by termites demanding a portion of liquid which is so pleasant to them.
Some termite-loving cockroaches creep in gallery leading from manure heap to
termitary. Termites burdened with manure hastening to the nest run by them.
But one of them stops near cockroaches. It starts touching one cockroach cautiously
with tips of antennae. In return the cockroach turns to the termite, and raises
its antennae. The termite belches some of the swallowed manure and freezes while
the cockroach licks food off from its mandibles. When the cockroach has finished
feeding, termite has touched its antennae once again. And after that at the
bases of antennae of the cockroach drops of secretions attractive to termites
appeared and shined. The working termite has cautiously grasped cockroach’s
antenna between its mandibles and licked off the secretions accurately. Then
it has repeated the same actions with another antenna of the cockroach, and
has continued its run to the colony.
Manure brought to the colony by dung termites is evenly distributed among all
its members. It will be digested completely, and each portion of it will pass
through intestines of colony members more than once, while in it anything edible
is present. But for dung termites manure is not only a food. One more important
application of manure is use in termitary construction. Large working termites
can prepare in their guts a kind of “concrete” of swallowed particles of clay
and manure. This mix gets to building walls or galleries as excrements, or being
belched. Construction work usually proceeds at night when air is more humid
and not so hot. And in sun heat of African midday wet walls easily clinker to
hard mass constraining successfully an impact of the most part of insect-eating
animals.
The nest of dung termites is located mostly under the ground, and stretches
to the depth of some meters. In its basis there is a spacious chamber where
the queen continuously making eggs and male impregnating it live together. Above
the “royal” chamber there is a series of chambers connected by through passes.
These are former apartments of main female of a termitary from which it gradually
moved to the bottom, more protected levels. In effuse nest they serve for ventilation
of levels.
Like roots, from a colony of dung termites galleries stretch. Some parallel
galleries lead to the main source of food for these insects, to heaps of ndipinotherium
manure. In manure heap galleries branch to the set of tunnels ending in the
thickness of manure heap. Here working termites store up manure as it is added
from above due to efforts of huge mammals. Some galleries are directed downwards,
to sources of water. Due to termites acting as water-carriers in the nest a
hundred-per-cent humidity of air is always supported.
From the surface of the ground dung termite colony looks like small rounded
hill. It can be mistaken for constructions of any rodents, or for objects of
inanimate nature at all, but there is one very characteristic feature in them.
The location of termitary is indicated by mushrooms of a specific kind. It is
a relative of giant manure mushroom living directly on manure heaps. Its name
is indicating manure mushroom, and its mycelium develops in optimal conditions
created in a termitary due to the activity of its inhabitants. Termites eat
a part of the mycelium expanding on walls of termitary galleries. Fruiting bodies
of indicating manure mushroom usually grow on edges of termitary, outlining
its size as a faltering ring. But occasionally these mushrooms literally break
open firm roof of termitary, and expand in resulted gaps in numerous clusters.
It causes certain inconvenience to termites: as fruiting bodies develop, insects
are compelled to putty with “concrete” cracks between mushrooms and termitary
to keep stabile the conditions inside the nest. On large domes of old termitaries
traces of mushrooms growth are visible as bumps and prominences. Possible, such
neighbourhood can seem not too favourable to termites, but it has the feature
invisible to a sight. The mycelium of indicating manure mushroom makes walls
porous – it sprouts through them, decomposing the manure included to building
mix used by termites. Due to this circumstance walls of termitary are penetrated
with microfissures and pores which provide the maintenance of an optimal microclimate
in insect nest due to air circulation and water evaporation.
The termitary is well fortified settlement of insects. However, there are some
species of animals living exclusively on ravaging of termitaries. Near the termitary
dome the small ant of very remarkable colouring has appeared: front half of
its body is black, and abdomen is almost entirely white, and only its tip is
reddish-brown. This ant has smelt air near the nest of termites and has vanished
in grass. It has hastened to the colony, leaving small odorous labels on ground
and grass. This creature belongs to a special species of burglar ants. The colony
of these insects had moved from other district, and had settled in abandoned
hole of certain rodent. The lonely ant is one of numerous scouts of this colony.
Many similar ants creep in vicinities in searches of termite nests. These ants
specialize in attacking of termitaries.
About a half hour passed after the occurrence of the scout ant. Much to the
regret for termites, nobody has eaten this ant during its way back, and it managed
to reach the colony safely. From the moment of the foundation of their colony
dung termites had not face these ants yet, but the moment of fateful meeting
comes closer and closer relentlessly.
In grass the column of burglar ants stretches towards the nest of dung termite.
It includes numerous small foraging ants, larger and aggressive soldiers, and
also representatives of completely special caste of burglars which are the main
hitting power during an attack. Soldiers of burglar ant are only a little larger
than working individuals, and differ in large mandibles. But the anatomy of
individuals of burglar caste is absolutely unique. These creatures are twice
longer than average forager is. They have huge head with thick mandibles, covered
with hard chitinous armour. These creatures are true alive armoured cars of
the ant world, self-moving battering rams for attacking on strong walls of the
termitary.
During the march soldiers of burglar ant keep at the sides of column, protecting
foragers and burglars from possible attack from flanks. The column moves guided
by odorous marks left by the scout ant.
In fast march the column comes closer to the termitary and begins decisive rise
on its dome. Termites are necessary for these ants – they make the basic food
of this kind of ants. Occurrence of the burglar ant species is the apotheosis
of a confrontation continuing for millions of years. Probably, next millions
of years will pass, and this branch of ant evolution will become a victim of
its own specialization. But while they have such plentiful and quickly restoring
source of food as termites, burglar ants survive successfully.
Forager ants disperse on the dome of termitary in searches of possible weak
spots for attack. But termites do not make exits on the surface of the building
– the only possible way to get into the colony is only through their underground
galleries. But the ally of termites turns to their enemy now – ants have found
out a place where strong crust on the surface of termitary was swollen up and
burst because of development of fruiting bodies of indicating manure mushroom.
Termites close up these cracks diligently at night, but the sun had no time
to dry up the repaired sites of the dome yet, and mushrooms continue their growth.
Foragers mark these places by smell, and along their trace the main hitting
power moves, individuals of the burglar caste surrounded by soldiers. Burglars
bite through less hard areas of dome, and break open the roof of termitary with
powerful mandibles. Near to burglar ants soldiers keep, and behind their bodies
foragers hide. In places where gaps appear, from the nest working individuals
of termites appear immediately. These soft creatures are completely helpless
against strong mandibles of ants, soldiers and foragers. Therefore in some minutes
after attack some forager ants already hasten back to their colony, holding
killed termites in mandibles. Attack against the termitary is led from several
places at once: in every place where it was possible to find out cracks and
weak places on dome of termitary. The smell of death enters the termitary from
places where ants attack. It is a sign of critical position for inhabitants
of termitary, and it is necessary to pass to definite actions.
Ants of burglar caste break off pieces of an external layer of termitary and
throw them aside, making a place for actions of soldiers and foragers. And at
this time some jets of liquid hit to their heads. The liquid instantly hardens
to rubber-like mass, and burglars appear pasted to the dome which they broke.
And some more new volleys of glue hit the heads to attacking ants. Soldiers
of dung termites crowd now in areas of galleries broken open by ants, and start
the chaotic “fire” to attackers. They are blind, but are guided confidently
by sense of smell. Accuracy of their shooting is low, but the number of attacking
ants is so great, that misses do not happen.
Advantage in fight gradually comes to the side of termites – numerical superiority
benefits them. Their large soldiers with white spots on huge black head start
restricting ants from the dome of termitary, and after them tens of working
individuals creep out of galleries and at once begin repairing the damaged galleries,
despite of hot sunny day. Soldier termites move towards the ants in long ranks.
Shots of glue overtake burglar ants one by one. Having depleted stocks of glue,
soldier termites recede, but the fresh soldiers ready to continue “fire” move
forward and replace them. On the battlefield still there are enemies, and they
still represent danger. Some burglar ants have remained pasted to the surface
of termitary. Glue on their legs and body gradually dries up, and they try to
free and to escape. But the receded soldier termites do not hasten to come back
to the nest. They remain on the surface of termitary and kill the immobilized
enemies. Among the captives waiting for their fate there are some ants of burglar
caste. These giants are strong and dangerous, and the dried up glue begins falling
off from their legs gradually, when they try to free. To one of such ants soldier
termite rushes, attracted by its smell and movements. It can’t immobilize the
contender – its stock of glue is depleted. But the soldier termite is armed
with powerful mandibles and is skillful in using them. It makes the only mistake,
rushing to frontal attack on burglar ant. Usually the termite bit through a
head of the enemy with the sole strong bite. But burglar ant is well protected
from head damages with strong chitinous armour. Mandibles of soldier termite
slide helplessly on head of an ant. But the ant does not lose an opportunity
to finish the contender – it seizes with mandibles the head of soldier termite
and cracks it. Another termite has stuck its mandibles in abdomen of huge ant,
and has killed it in the next moment
The column of black-and-white ants leaves from the termitary. Many forager ants
are burdened with booty – they bear killed termites. But nevertheless this time
the victory is at termites: they have successfully beaten off the attack of
burglar ants and prevented the invasion of these predators inside the termitary.
Losses from their side have made some hundreds of working individuals killed
in first minutes of ant attack, and tens of soldier, killed at the defense of
a termitary. However it is a small number in comparison with the total number
of inhabitants of the colony. Burglar ants will certainly return to the colony
of dung termite – in vicinities of their settlement there are some termitaries
made by insects of different species, and ants periodically arrange attacks
on termites, killing a part of individuals for the sake of livelihood of their
own colony.
Ndipinotheriums walk slowly across the savanna, nothing suspecting about the
whole world of creatures creeping under their legs and depending completely
on their well-being. They do not suspect at all about the majority of its inhabitants,
and some are perceived only as fleeting trouble in life, but no more. They notice
from apart the manure heap left by relatives, and also leave their excrement
in it. While the herd is near manure heap, large horseflies bite several ndipinotheriums,
and from the back of one animals large female of jumbo dung beetle flies down
on fresh manure, shining with its golden wings. Life proceeds, even if some
inhabitants of ecosystem die – its death is a source of life for other creatures:
in nature there are no superfluous and unnecessary things.
Bestiary |
Dung
termite (Platycephalotermes stercophagus)
Order: Termites (Isoptera)
Family: Termites (Termitidae)
Habitat: savannas of Northern Africa.
Success of termites in struggle for existence and also significant evolutionary
longevity of this group of insects are determined by two factors. First of them
is a social way of life, helping them to erect dwellings huge in comparison
with the size of separate individual, where conditions favorable for existence
are supported. And second is symbiosis with protozoans which had increased the
efficiency of termite digestion and had made plant cellulose, the organic substance
most widespread on land, accessible for them. Thus, termites are reliably protected
from predators and an adverse environment, and have absolutely no feeding competitors.
Among Neocene termites one species appeared, which safe existence depends on
prosperity of megafauna in Northern African savanna. It is so because this termite
widely uses in daily life waste product of these animals, their manure. In places,
where giant ndipinotheriums or flathorns make collective manure heaps, this
species, named as dung termite, lives.
This termite is similar externally to other species of this group. Dung termite
has rather large head and wide mandibles with which help these insects gather
food. Queen, soldiers and winged individuals of this species have normal well-developed
eyes. Eyes of nymphs are small, and adult working individuals are completely
blind. They move to manure heaps of mammals using underground galleries, and
search for fresh manure with the help of sense of smell.
Queen is a basis of safe existence of termitary. The size of this individual
is really monstrous: more than 15 cm. But the most part of its length is made
of huge hypertrophied abdomen, on which the head and thoracal segments with
legs look like inappropriate appendages. Queen lives in well protected and ventilated
chamber at the depth up to one meter under ground surface. Life expectancy of
this individual reaches 10 years. The colony exists for approximately the same
time. But in favorable conditions growing old queen may be substituted by one
or several young queens, and the colony continues the existence.
Soldiers represent the main protection of dung termite colony. Their size may
be up to 25 millimeters, and their appearance is rather characteristic. These
insects have large head: nape is curved upwards and back, and covers thoracal
segments from above. But the most part of head is taken not by brain, but by
hypertrophied salivary glands. It is a part of protective adaptations of soldier
termites: they spat to the enemy sticky liquid stiffening in air to rubber-like
mass. With the help of such weapon soldier termites easily immobilize ants,
their main enemies. Head of these individuals has contrast colouring, black
with white spots on forehead and crown. In case of danger soldiers move towards
the enemy and shoot them with glue.
Workers of this species are about 12 – 15mm long. They have short, flattened
and expanded in front head of black color. From external edge of mandibles head
is “elongated” by jagged combs. In addition similar outgrowths are at the edges
of thoracal segments. It is connected to features of activity of these insects.
Transporting animal dung to the colony, working individual loads manure atop
of its body, sapping under it by head. At the same time worker eats manure and
brings a part of it to the nest partly digested. Abdomen of working individuals
can stretch, containing large portion of forage.
Nest of dung termites has rather simple construction. It is a dome-shaped construction
no more than 30 – 40 cm high and up to one meter in diameter. But it is only
seen part of colony. From termitary some galleries stretch to manure heap, and
along them the stream of working individuals gathering manure moves all the
time.
This species utilizes dry and aged manure at night. This termite eats it, delivering
semidigested food to neighbours. When in food passed through intestines for
some times nutrients end at last, working individuals use it for building: they
face gallery walls with this mass. But the most part of “mortar” is used for
regular repair of termitary dome. The reason of such use is simple: besides
numerous symbiotes in nest of dung termite mushrooms of a separate species grow,
indicating manure mushroom. Termites eat not only manure, but also mycelium
of this mushroom species. A by-effect of presence of mushrooms is the growth
of their fruiting bodies through the dome of termitary. Thus growing mushroom
breaks open firm crust of the nest, and termites constantly cover the basis
of mushrooms with fresh “concrete” mixed of manure and clay. On smooth surface
of termitary there are numerous “scars” in places where mushrooms sprouted through
a roof of the nest. However nest is repaired by numerous working individuals
quickly and in proper time. Harm made by mushrooms is insignificant, but the
mycelium provides porosity of walls of termitary, due to which the optimum microclimate
is kept inside termite nest.
Termite-loving
cockroach (Coproblattula termitophila)
Order: Cockroaches (Blattodea)
Family: Blattids (Blattidae)
Habitat: savannas of Northern Africa, nests of dung termites.
Usually in nests of social insects various invertebrates of other species search
for shelter and food. Some of them are symbiotes, and others are predators and
eat larvae of excessively hospitable host insects. “Guests” belong to various
systematic groups: among them there are beetles, flies, crickets and caterpillars
of various butterflies and moths. Also cockroaches are frequent among these
animals. One species of symbiotic cockroaches lives in nests of African dung
termite –it is a termite-loving cockroach. This kind of insects does not form
close relations with the host species, and its presence does not harm to termites.
But cockroach is protected against predators by termites, and its nymphs have
sanitary function in termite nest.
Termite-loving cockroach is not able to fly and is absolutely wingless. Its
body up to 3 cm long has oval shape and is flattened. It is covered with soft
elastic cuticle of grey color with thin white hairs. This cockroach is adapted
only to life in conditions of high air humidity. Legs of termite-loving cockroach
are short, and it is not able to creep quickly. In an adult condition this insect
is completely blind, though nymph has well-advanced eyes. Termite-loving cockroach
has long antennae separated into two parts: in the basis of antenna there are
some large glandulous segments, and the rest of antenna is thin and sensitive.
This species is unpretentious in choice of food: it feeds on manure. Due to
symbiotic protozoans living in its digestive system termite-loving cockroach
is able to digest the plant rests it finds in manure. Sometimes termites feed
it with partly digested food –with manure again. Usually termites do not tolerate
insects of other species in their constructions, and dung termites are not exception
in this rule. However termite-loving cockroach provides the loyal relation to
itself from their side, because it secrets sweet liquid from special glands
located at the bases of antennae. With the help of such “payoff” it lives in
termite nest in safety.
This cockroach completes its life cycle in termite nest. Female of termite-loving
cockroach is larger than male. After mating it lays an ootheca containing up
to 20 large eggs. Female carries it at the tip of abdomen within two weeks while
the embryos development proceeds.
Nymphs of this cockroach are more mobile, than adult individuals. Also they
appreciably differ from adult termite-loving cockroaches in appearance: they
have gracile rounded body, large eyes and harder body covers. It takes place
due to the important difference in way of life of nymphs and adult individuals
of this species. Adults of termite-loving cockroach never leave the termitary,
and their well-being completely depends on life of termites. But at larval stage
this species settles actively, and due to inclination of nymphs to travelling
there is a gene exchange in populations of cockroaches. Some nymphs start their
wandering – at night they creep out on ground surface and to the morning they
climb on tops of grass stalks. Here they wait for appearing of large herbivores,
flathorns and ndipinotheriums. When animals of any herd visit manure heaps,
nymphs of termite-loving cockroach creep on their skin and travel this way in
relative safety, moving to many kilometers from a native termitary. During the
visiting by animals of the next manure heap nymphs leave them and search for
nest of manure termite. Not all of them manage to do it, but the individuals,
which could make it, create a new population of cockroaches in termite nest,
or contribute to gene pool of already existing one.
Having got into the nest, nymph goes through several moultings and turns to
a similarity of adult individual. It becomes less mobile, eyes decrease at each
moulting down to complete reduction, and body cover becomes soft and water-permeable.
Nymph reaches the size of adult individual in 3 months, and from that moment
it becomes able to breed.
Grieving
swallowtail (Funestopsyche necrophagus)
Order: Butterflies (Lepidoptera)
Family: Swallowtails (Papilionidae)
Habitat: savannas and woodlands of North Africa and southern Europe.
Picture by Biolog
On the top of food pyramid of the ecosystem a large predator
stands. In savannas of North Africa and southern Europe bordering a hollow of
dried up Mediterranean sea, such supreme predator is deadlynetta (Necrogenetta
deima) – huge saber-toothed species of viverrids. Its prey includes large local
animals: flathorns and ndipinotheriums, huge giraffe ostriches, and also very
large rodent mighty grasscutter. In addition to deadlynetta in savanna there
is a set of other predators, from small up to rather large. When such predators
eat prey, near them various scavengers wait for their share. They understand
that if they will hurry, they may draw upon themselves the aggression of predator.
But some impudent ones easily receive the share of forage – they do not demand
too much, therefore predators do not drive them away. One of such impudent scavengers
is a snow-white butterfly with black border on wings. Long “tails” on wings
specify its belonging to family of swallowtails. This species never meets on
flowers, but gathers in great number on dead animals. For this feature this
butterfly is named grieving swallowtail.
Adult butterflies of this species never meet on flowers – they had completely
lost ability to eat vegetative food. But these butterflies fly by tens to smell
of blood and meat. They literally stick round the prey tormented by predator,
and are not afraid to sit on the muzzle of animal soiled with blood. Having
unwrapped long proboscis, butterfly licks off blood and meat juice which make
food of this insect. Besides of fresh prey of predators, this butterfly is able
to feed on decomposed corpses of animals.
Wingspan of grieving swallowtail makes about 15 cm. Flight of this butterfly
seems slow and majestic, but it is deceptive impression – butterflies fly very
quickly, and already literally in some minutes gather on prey of various predators
in tens. Colouring of wings of this butterfly confirms somewhat the name of
species – on white background of wing the black border is brightly visible,
and some large nerves in wing basis also may be black. On back wing there is
long “tail”near which there are some other shorter shoots.
On prey of predators butterflies not only eat, but also pair. Only time when
these insects are interested in plants is a larval stage. The caterpillar of
grieving swallowtail eats on leaves of trees – more often it can be met on leaves
of acacias in the top part of crone. The caterpillar of this swallowtail is
colored dark brown with grey longitudinal strokes on sides. It keeps on bottom
side of leaf, escaping from hot sunlight. Development of caterpillar lasts about
four months, and for one year the grieving swallowtail can give two generations.
This insect goes through driest months in pupal stage and finishes metamorphosis
in the beginning of rain season.
Jumbo
dung beetle (Titanonitus aureus)
Order: Beetles (Coleoptera)
Family: Scarab beetles (Scarabeidae)
Habitat: savannas of Northern Africa.
Picture by Biolog
In human epoch, when various species of wild ungulates lived
on the Earth, dung of these animals was used for food by various dung beetles.
As wild fauna disappeared and agrarian landscapes expanded, the species capable
to process manure of domestic cattle, and also the species eating dung of small
mammals had received an advantage in struggle for existence. The latter group
of beetles had got advantage in a survival in conditions of drastic impoverishment
of ecosystems at the boundary of Holocene and Neocene. And when large herbivorous
mammals evolved on the Earth again, among dung beetles large forms also appeared.
On manure heaps of ndipinotheriums and flathorns the largest dung beetle of
Neocene lives –it is a jumbo dung beetle. The total body length of adult insect
is over 10 cm, and its weight exceeds 100 grams. Body of this beetle is lengthened,
covered with hard shell. The appearance of jumbo dung beetle is very attractive,
despite of unpresentableness of its habitat. Representatives of both genders
have beautiful golden colouring of elytra. When this insect flies up, the bluish
colouring of abdomen with metal shine, especially appreciable at males, turns
visible. Head and thorax are dark brown at female and velvety black with “gray
hair” of short hairs at male. On pronotum of the male the horn bent forward
grows. Tip of this horn is blunt and forked. Because of this “ornament” the
length of jumbo dung beetle male may be larger, up to 12 – 13 cm. On head of
male there is a horn also, wide and having three points. When male raises head,
jags of two horns engage with each other, forming tong-like gripper used for
tournament combats and for self-defense. Females have two small blunted horns
directed in sides on pronotum.
Courtship tournaments of jumbo dung beetles take place right om manure heaps.
Males battle against each other and try to seize the contender by horns. Having
attacked the contender successfully, male picks it up by horn on head, and,
having raised its head, compresses it strongly between horns on head and pronotum,
like in tongs. Males winning in tournaments copulate with females and do not
tolerate the contender on won manure heap. Usually male displays itself to potential
opponents, keeping on the top of sun-lighted manure heap. Weaker males avoid
searching for meetings of females in its possession, and fly out. But, if another
male landed on manure heap already occupied, it is perceived as a challenge,
and males arrange a duel.
Parental behaviour of jumbo dung beetle is very simple compared to those at
dung beetles of human epoch. Female lays eggs one by one directly in manure
heap of ndipinotherium, not being engaged in building of any shelter and preparation
of forage stocks for posterity. Grub hatching from egg at once appears surrounded
with food which stock is constantly replenished. Numerous grubs burst from eggs
left by different females live in the same heap of manure. For egg laying female
of jumbo dung beetle prefers fresh manure. It searches for it in very simple
way: after mating female leaves manure heap and flies to search ndipinotheriums
or flathorns. It simply lands on rear part of body of any animal, and, having
felt the occurrence of fresh manure, quickly flies off from the animal body
and lays eggs in manure. If animals walk out, female finds an animal by smell
and returns to it.
Jumbo dung beetle grub reaches the length of 20 cm. It has soft fat body and
head with hard head capsule. These creatures dig deep vertical holes in manure
heaps of ndipinotheriums. In hot day time they hide inside manure heap. New
portions of manure left by herbivores can block the hole entrance, but grub
simply eats a tunnel through it. Whenever possible grubs of jumbo dung beetle
diversify a diet with food of animal origin: they eat other insects casually
fallen down in their hole. Due to powerful mandibles they gnaw through undigested
vegetative fibers, and also can defend themselves from enemies. Also for protection
against enemies grubs of jumbo dung beetle belch undigested food and spat it
to the enemy.
The development of larva lasts for about one year. It pupates in ground, leaving
the borders of manure heap. The adult insect can live for about one year.
Burglar
ant (Pachycephalomyrma destructor)
Order: Hymenopters (Hymenoptera)
Family: Ants (Formicidae)
Habitat: Northern Africa, dry areas – savanna and light forests.
Picture by Biolog
In a history of terrestrial fauna there are two large clades
of social insects proceeding a severe war against each other within millions
years without an armistice. These ones are termites known, possibly, from Permian,
and ants, representatives of hymenopters, evolved in Mesozoic. Both groups of
insects passed to social habit of life independently from each other, and lead
absolutely different ways of life. Termites are tireless processers of organic
matter, decomposing even difficultly decomposing substances like cellulose.
Ants are mostly predators able to attack animals of much larger size, rather
than their own, and to kill them. Termites are compelled to protect themselves
from enemies and dry air, and for this purpose they erect the buildings of intricate
design remarkable in exclusive hardness. Ants do not avoid heat, and they are
ready to attack any creature wishing to ravage their colony. And some ants do
not build permanent shelters at all.
Termites represent usual inhabitants of a tropical zone of the Earth. In Africa
their buildings may be seen in fact everywhere. And one species of ants had
adapted to attack well-fortified colonies of termites. This species is named
as burglar ant.
The most part of a colony of burglar ant represents tiny working individuals.
Their length does not exceed 10 – 12millimeters. But in a colony there are also
the “soldiers” growing to the length of 15 – 18mm. And their strong mandibles
add extra 5 mm to their length. Burglars ants differ in large head and rather
aggressive behavior – even the average working individual may be aggressive,
and easily overcomes “soldier” of other ant species attacking the nest of burglar
ant. And stings of ants belonging to “soldier” caste are enough to frighten
large herbivorous mammals, which may represent any danger to a colony of these
ants.
Colouring of these ants is obviously aposematic: abdomen is white with reddish
tip, and thorax and head are coal-black. This colouring is shown at all castes
of burglar ant. But at individuals of “soldier” caste abdomen is brighter –
it is almost entirely reddish, except for the two first segments.
Amazon ants attack colonies of other ants in order to capture pupae from which
in their own colony “slaves” will develop. Burglar ant uses colonies of termites
only as a food source. The siege of termitary is a very complicated task: sun
heat dries up an external layer of their building up to stone hardness. But
burglar ant had adapted to attack termite mounds in the special way. In colonies
of this species there is a special caste of “burglars” with strong mandibles
and head protected with an armour; the length of such ants is about 25 mm. The
head of ant from “burglar” caste makes up to almost 40% of total length of an
insect. Mandibles of “burglars” look unlike long and jagged at the internal
edge mandibles of “soldiers”. “Burglar” has short thick mandibles with one small
jag at the internal edge. On its head chitinous cover is very thick and forms
a semblance of a shield – edges of an armour cover eyes and the bases of antennae,
and mandibles jut out from under their front line. Such heads are absolutely
impregnable for bites of termites protecting their nest. A role of “burglar”
caste during the attack is an expansion of entrances in termitary. “Burglars”
bite off a top layer of termitary by mandibles, opening the way to “soldiers”
and foragers. In addition they make a kind of mobile shelter for “soldiers”
at the defense against the termites protecting their colony.
These large individuals are tetraploids, but they burst from usual eggs. At
burglar ant first divisions of egg cell do not finish completely frequently
enough, and only a doubling of a chromosomal complement takes place. From such
eggs larvae appear, which grow to much larger size, rather than usual working
individuals and “soldiers”. They grow faster, but need much more food for it.
However, the expenses of rearing of “burglars” pay off by successful final of
the most part of attacks to termitaries.
The own nest of the burglar ant is not a complex and strong architectural masterpiece.
These insects arrange a nest at the basis of trunk of large tree with core rotted
through. If such trees are not present, they can use ready holes of various
animals for the arranging of their nest– any other animal prefers to abandon
hole, if these insects settle there. Ants arrange in a hole some simple chambers
in which fertile females and larvae are placed, or rearrange minimally the ready
parts of a hole, expanding or narrowing entrances. Colonies of ants which have
choice of food sources – some colonies of termites, even of various species
– develop in the best way. In this case colonies have time to restore after
attacks of burglar ants. If after regular attacks of ant army the termitary
degraded and population of termites perished, burglar ants can move to new place.
Their queens have kept ability to move in normal way, and the colony of ants
is able to spend some days in move, searching for a new place for life. At these
moments they move also larvae and even eggs. During the resettlement “soldiers”
and even “burglars” protect their colony.
Ndip
horsefly (Titanotabanus ndipiotheriophagus)
Order: Two-winged flies (Diptera)
Family: Horseflies (Tabanidae)
Habitat: Northern Africa, savannas and light forests.
Picture by Biolog
Holometabolous insects had received a distinct advantage compared
to more primitive relatives at which from eggs tiny copies of adult individual
burst. The difference in a way of life between larva and adult individual allows
them to use the resources available in their habitat in fuller degree. All largest
orders of this class include holometabolous insects not casually.
African megafauna had enabled evolution to various species of the insects depending
on giants of Africa. Among the animals dependent on well-being of huge herbivores
ndip horsefly, very large insect, is remarkable. Imago of this species reaches
the length of 40 – 45 mm. This insect has an appearance typical for horseflies:
head with huge eyes, stabbing mouthparts and flattened abdomen, which segments
are connected by extensible zones of cuticle. Due to such features of anatomy
ndip horsefly can easily pierce thick skin of large mammal, and sucks up to
2 milliliters of blood per one feeding. In addition to huge size, this insect
has easily recognizable features of colouring: on light grey background of thorax
and abdomen thin longitudinal lines of hairs reflecting ultra-violet light stretch.
Therefore for the relatives and other animals distinguishing ultra-violet beams
this insect has striped pattern. Eyes of this horsefly are transparent golden
with iridescent shine. On tips of wings at males there are black spots, and
females detect them in flight due to these spots.
This species of insects feeds on blood of large animals of savannas – ndipinotheriums,
flathorns and giraffe ostriches. The sting of this horsefly is painless, but
in some minutes the bitten place strongly swells and itches.
After feeding female searches for shelter where it spends some hours almost
completely motionless. At this time in its organism eggs develop – some portions
of 20 – 30 ones. For egg laying female of ndip horsefly needs the presence of
ndipinotheriums, or, more precisely, their waste. It lays eggs in manure heaps
of these mammal. To lay eggs female chooses areas of manure slightly dried up
on surface, but moist from inside. It is easier to lay an egg in such places,
but in some hours sun will dry the top layer of manure much more and will make
it more firm. In this way larva will be protected from predators. However, it
is a predator itself. Ndip horsefly larva digs extended holes in manure heaps
of ndipinotheriums. This worm-like creature about 70 mm long is one of the most
terrible predators in its habitat. It has pointed chitinous hooks around the
mouth to keep and to tear its prey. It attacks insects and others invertebrates,
including the spiders dangerous to adult individual of this species. The body
of larva is covered with greyish-white transparent cuticle, which easily stretch
and folds. On every segment belts of strong black bristles grow, and their tips
are directed back. Bristles on segments help larva to move in holes. It digs
holes, extending and contracting the forward part of the body like earthworms
do. During the digging of the hole pointed hooks near the mouth are covered
with plica of cuticle and are not damaged at the movement.
The larva development takes about two months. For pupating it leaves manure
heap at night, and digs itself in friable ground among grass where it is more
difficult for finding to insect-eating animals. Metamorphosis lasts for about
one week. Life expectancy of adult insect does not exceed three weeks, but usually
it is significantly shorter. For this time female can lay up to 200 eggs.
Manure
shining spider (Callolycosa coprobia)
Order: Spiders (Araneae)
Family: Wolf spiders (Lycosidae)
Habitat: Southwest Europe, savannas of Northern Africa.
Picture by Biolog
In nature of the Earth some groups of live organisms can form
extensive landscapes. It had taken place so in Cenozoic, when the union of graminoids
and hoofed mammals had caused extensive productive communities – grasslands.
In Neocene graminoids still prosper, and numerous herbivorous mammals do not
allow savannas to turn to woodlands. Collision of Africa and Europe had resulted
in occurrence of extensive dry areas surrounding dry desert of Mediterranean
lowland. Large herbivorous mammals live in these places – harelopes,
flathorns and ndipinotheriums.
Except for them, the mite in formation of landscape is brought by huge giraffe
ostriches. All these herbivorous animals devour a plenty of vegetation, producing
the appropriate amount of manure. Many species of insects feed on manure of
herbivores, and this circumstance has involved the separate species of wolf
spiders – manure shining spider – to manure heaps
Body length of the adult female of this species is about 17 mm. Manure shining
spider differs in very bright and beautiful coloring. The body is covered with
plentiful hairs having intensive metal shine. Forward part of cephalothorax
at animals of both genders is brown with additions of black hairs, but back
part of cephalothorax, abdomen and legs are colored bright with metal shine.
Body of the female is crimson-red and orange on the tip of abdomen. Male is
smaller, then female (length of its body is less than 1 cm), and its body is
colored blue. Hairs on the male body reflect ultra-violet beams intensively,
involving to it insects, its potential prey.
The body shape of this species does not differ in any remarkable features. Legs
are partly specialized for digging: the terminate segments of back legs are
flattened, as if shovels. This spider, similarly to the majority of representatives
of family, does not build cobweb, and leads vagrant life. It keeps in heaps
of manure, and builds to itself temporary shelters – spider digs by back legs
vertical burrows in substratum. Building the burrow, spider is dug in manure
by back; therefore its bright colouring the most part of time is imperceptible
for possible predators. By forward legs the animal holds the cover of cobweb,
which closes the entrance to the burrow. On cobweb pieces of dry manure and
dust are pasted, masking the entrance to the burrow. Manure shining spider prefers
to live in places where inhabitants of savanna leave manure constantly. Only
at drying or destruction by other animals of manure heap it passes to fresh
manure.
Manure shining spider hunts insects involved with manure. More often flies and
dung beetles become its catch, but occasionally it catches even butterflies,
which receive mineral substances from manure and frequently visit manure heaps
of large animals. Usually the spider hides in burrow and expects, while possible
catch comes nearer to it itself. Having seized the moment, it jumps out from
burrow by jerky throw, seizes an insect, and hides in refuge again.
On pedipalps of this spider combs of rigid hairs are advanced – spider cleans
itself by them. Living in the environment, rich in bacteria and other pathogens,
this spider spends a lot of time, clearing body from manure.
As plentiful and constantly renewing manure heaps meet in savanna rather seldom,
manure shining spiders relate to congeners very unfriendly. Exception is made
only by the female for the male in short minutes of pairing. Declaring about
the territorial claims, spider of this species shows itself to the contender,
sparkling in sunlight by bright colouring with metal shine. But the spider necessarily
keeps by one leg for the edge of hole, ready to rush to shelter at first sign
of danger. The heap of manure usually is shared by several females, and on edge
of their territory vagrant males not building long-term shelters gather.
Colouring of manure shining spider is also aposematic: its bite causes severe
pain in large animals; however it is not dangerous to life. Small animals, however,
may die from bite of this spider. But thus spiders frequently become prey of
birds, which kill them by impact of beak. Also lizards hunt these spiders.
At the majority of spider species male is much smaller, than female, and manure
shining spider is not an exception here. Therefore the male of this species
very cautiously approaches to problem of pairing. At first the spider accustoms
the female to its presence, leaving odorous marks near her hole. Then it appears
at the edge of territory of the female, trying to come nearer to her cautiously.
If the female perceives him quietly, the male resolves to pairing. Before it
he arms with piece of dry manure, and creeps in hole of the female bravely.
He literally wedges her by this original weapon, braids legs of the female with
web, and quickly couples with her. Using such preparation, after pairing the
male frequently escapes from the female, and has an opportunity to fertilize
up to five females before it becomes a casual victim of one of them.
In clutch of manure shining spider there is about 150 small eggs packed to snow-white
web. But cocoon turns soon dim brownish-grey color because of specific inhabitancy
of this species of spiders. The female with cocoon leaves manure heaps – it
is too brisk place dangerous to young growth. She lives in old holes of rodents
or in others shelters. The young growth becomes sexual matured at the age of
about half-year.
The close species lives in savannas of Northern Africa: cadaverophilous
shining spider (Callolycosa cadaverophila). This species of spiders
had chosen as an inhabitancy corpses of animals at various stages of decomposition,
and eats necrophagous insects. Colouring of this spider is also bright: the
female is bright green with white spot on cephalothorax, and the male is bright
red with white tips of front legs. The cadaverophilous shining spider is less
adhered to the certain place of inhabiting and can overcome long distances in
searches of suitable substratum. With the help of sense of smell it easily finds
corpses of animals. Cadaverophilous shining spider digs in the ground near them,
and catches necrophagous insects, and also gathers larvae of flies. This spider
frequently settles near lairs of large predators like deadlynetta.
Large
griffon woodpecker (Carnopicus maximus)
Order: Woodpeckers (Piciformes)
Family: Predatory woodpeckers (Carnopicidae), Scavenger woodpeckers subfamily
(Carnopicinae)
Habitat: savannas of Northern and Southern Africa.
Mass extinction causes the disappearing of, first of all, animals dependent
on other animals – predators and parasites. When number of herbivores may reduce
tens of times without damage to survival of the species, number of predators
dependent on them may decrease below critical level much easier. At the boundary
of Holocene and Neocene such destiny has befell many species of predatory birds
depended on large prey. In Neocene species from other groups, passed to feeding
by meat independently to “true” predatory birds, have started to occupy their
place. Woodpeckers appeared the most unexpected species among feathered “meat
eaters”. Some species of these birds began to assimilate the exempted ecological
niches, becoming unusual and fantastical creatures. Carnivorous species of woodpeckers
form the separate family inhabiting Old World, except for Australia and Oceania.
These birds differ from “typical” woodpeckers in transition to completely different
diet. They form some species divided to two subfamilies: scavenger woodpeckers
(Carnopicinae) and true predatory woodpeckers (Loricaflangerinae).
The subfamily of scavenger woodpeckers (Carnopicinae) inhabits savannas and
steppes of Africa and Eurasia. It includes the birds eating carrion and rests
of catch of large predators, and numbers some species, among which large griffon
woodpecker is the largest one. In general, it is the largest woodpecker of the
Earth in Neocene epoch.
Large griffon woodpecker is rather big bird up to 1 meter long kept the characteristic
features of woodpeckers: pointed beak, four-toed paws (two toes are directed
forward, and two ones back), and strong tail of rigid feathers. The face of
this bird is featherless, covered with skin of pinkish-blue color; nape and
neck are feathered. On head there is a crest of red feathers sticking upwards.
Neck is short, but mobile and muscled. Wings are brown with two yellow spots
on bends, well visible at perched bird. Other body parts are grayish-white.
The woodpecker frequently lands on the ground, but is not able to walk and moves
on the ground by jumps.
This bird eats carrion and can be frequently seen among various scavengers in
savanna. Due to the cockiness and aggression this woodpecker easily determines
the priority of food eating even if this bird had founded the prey not first
of all. These woodpeckers often watch hunting of large predatory animals, and
in case of success of predator drive other competitors off from its catch. And
if the bird sees it may have no rests of meat, it can even attack the predator,
perceiving it as a competitor. In Northern Africa this bird is the main scavenger
able even to frighten off the deadlynetta from catch (the powerful beak of this
woodpecker may pierce the skull of predator). Due to hard beak bird can easily
open even the thickest skin of animal, and this species frequently begins a
feast on carcasses of animals with thick skin inaccessible for other scavengers.
This woodpecker feeds exclusively on meat, not interesting in firm parts of
carcass. Bird tears off pieces of meat by jerky movements of neck and swallows
it. Because of features of feeding large griffon woodpecker can not eat the
carcass completely, being limited only to the softest parts of it.
After feeding the bird looks not so tidy: head of woodpecker is splashed with
blood that gives rather ominous appearance to it. But griffon woodpecker keeps
up the plumage cleanliness accurately: bird willingly bathes in shallow pools,
“powders” itself with dust, cleans feathers by beak, and “sunbathes”for a long
time, having placed head and opened wings to sun beams.
This species of birds is strictly territorial because carrion is the forage
accessible in rather seldom cases (except for cases of epizooties). Being a
monodin, this bird keeps in amicable breeding couples, expelling strangers from
the territory in common. Expressing the territorial claims, birds arrange deafening
“concerts” every morning: voice of this woodpecker represents very loud and
unpleasant guttural calls repeating for many times. Usually pair of birds cries
alternately or simultaneously since a half of hour.
Large griffon woodpecker has not lost habits of ancestors, and nests in tree-trunk
hollows. Because birds of this species are rather large, it is difficult for
them to choose a tree-trunk hollow of suitable size for themselves. Therefore
couple of woodpeckers can hollow out or expand a hollow in trunk of large tree
(for example, of baobab). Large griffon woodpeckers nest only once per one year.
In clutch of these birds there are two large eggs (equal to goose eggs in size)
with white shell. Nestlings hatch naked and blind. On their legs the calluses
are advanced, permitting nestlings to sit on rigid bottom of hollow. Parents
feed them with meat and various small vertebrates. Development of nestlings
proceeds for a long time: at monthly age they only start covering with juvenile
down and open eyes at the age of two months. They do not compete for food as
intensively as nestlings of predatory birds, but at lack of forage more active
nestling takes all food brought by parents, and the second nestling dies for
famine. To the moment of leaving from nest (at the age of half-year) young birds
are a little bit heavier then parents. They and parents feed together for about
two months, but later parents start to display aggression to them, and expel
them from the territory.
In tropical and subtropical areas of Old World some close species of griffon
woodpeckers live:
Smaller
griffon woodpecker (Carnopicus medium) lives in steppes of Central
Asia and in India. It is a close relative of large griffon woodpecker, similar
to it in anatomy and features of feeding. Body length of this bird is about
50 cm. It is colored slightly differently, than its large relative: naked skin
on face is yellowish-white, head lacks crest, and instead of it there is simply
red “cap” of short feathers on the nape. Wings are black with large blue spots
serving for recognition of congeners. Body is colored pale grey. In feeding
and behavioural features this species is similar to large griffon woodpecker,
differing from it by voice: instead of series of abrupt calls birds utter in
unison loud extended call in the morning. Also this species can diversify a
diet with small ground vertebrates.
Pygmy griffon
woodpecker (Carnopicus minor) is the close relative of the previous
species; it lives in open spaces of Europe (from the Gibraltar Isthmus along
southern slopes of Alps and northern edge of Mediterranean swamps) up to the
western areas of Three-Rivers-Land. It is the smallest species of genus: it
is only a sparrow-sized bird. The bird is colored grayish brown (back is darker);
on the head there is a red “cap”, stomach is white. Naked skin on face of bird
is greyish-blue. This bird also eats carrion. The behavior of this woodpecker
has appreciably changed in comparison not only with its relatives from more
southern areas, but also with all woodpeckers in general: it is a flocking bird.
Usually these birds keep in flocks numbering 20-30 individuals. They observe
of large herbivores, watch the behavior of predators and other scavenging birds.
Having noticed dead animal, these tiny woodpeckers literally stick it round
with live carpet and peck meat.
Similarly to all species of woodpeckers, this species nests in tree-trunk hollows.
These woodpeckers live in colonies numbering up to two tens of nests, and protect
them against predators in common. Probably, lack of “living space” in steppes
has resulted in social way of life of these birds. In clutch of these woodpeckers
it is up to 5 – 6 eggs, and about a half of hatched nestlings survives up to
leaving the nest.
This species of birds is discovered by Simon, the forum member.
Bone-breaking
woodpecker (Ossiflangerus medullaphagus)
Order: Woodpeckers (Piciformes)
Family: Predatory woodpeckers (Carnopicidae), Scavenger woodpeckers subfamily
(Carnopicinae)
Habitat: savannas of Northern and Southern Africa.
Picture by Amplion
After the carcass is almost eaten by scavengers, bones usually
remain. It is possible to use them in various ways – to swallow and to digest
as marabou and hyena did, or to break, having dropped from the big height, like
the lammergeyer did. But the bone-breaking woodpecker, the scavenger of the
Neocene Earth, acts in completely different way.
Already the Latin name of this bird sounds horribly – “the bone-crushing marrow
devourer”. But the behavior of bone-breaking woodpecker does not cause horror
in other inhabitants of savanna at all, though it corresponds to this name.
This species is brisk and sociable crow-sized bird. It is colored rather brightly
– back and wings are green, body is ash-grey, on nape there is the orange crest
able to rise and fall, as if at cockatoo parrot.
Bone-breaking woodpecker differs in original and very strictly specialized way
of feeding. It flies in savanna, searching for dead animals, and during the
feast of predators or scavengers it modestly waits aside while meat eaters will
be saturated. When only bones remain from a carcass, it starts a meal. Bones
of suitable sizes, even rather old, are carrying by bird to its favorite “anvil”
– the handy forked branch of tree. Bird fixes it there and breaks from one of
head sides by powerful impacts of beak. Bird pecks out and also licks by long
tongue the nutritious marrow from the broken bone. This substance makes a significant
part of the menu of this species. If the bone is rather large and the woodpecker
can’t carry it in beak to the handy place, it pecks it right on the spot. The
vast territory, in which the enough number of herbivores and also predators
lives, whose catch mainly serves as food of this bird, is necessary for life
for such woodpecker. By virtue of these circumstances bone-breaking woodpecker
is very territorial and expels congeners from its possession actively.
These birds live in tree-trunk hollows made by them. Woodpeckers of this species
are strict monodins. Pairs are formed to the whole life though relations inside
family at these woodpeckers are very original: usually birds “hunt” bones separately
and in general meet only in nesting season, adhering only to common territory.
They communicate with each other, uttering loud calls in the morning and in
the evening, and listening to the answer of the mate. Nestlings of this species
(there are 2 – 4 nestlings in hatch) are fed up with insects, food traditional
for woodpeckers. When nestlings grow up and prepare to leave nest, parents start
to feed them up with marrow, and then the whole family migrates together for
a certain time, and nestlings train to search for food.
“Anvil” takes the special place in life of bone-breaking woodpecker. It is the
handiest forked branch, and each woodpecker has its own one. In fact, “anvil”
is the center of bird’s territory, and life of each individual or pair is concentrated
around of it. The woodpecker protects the “anvil” from competitors. In courtship
season the nesting pair uses the male’s “anvil”.
The bone-breaking woodpecker is widely spread in Northern and Southern Africa,
coming by the Gibraltar Isthmus to Southern Europe (at the northern slope of
the Alps there are small populations replenishing due to birds flying from Western
Europe). The zone of tropical woods breaks off its area to two sharply bordered
parts.
In Southern Asia, Hindustan and the north of Zinj Land the close species lives,
Asian
bone-breaking woodpecker (Ossiflangerus asiaticus). It is a smaller,
pigeon-sized bird. It differs from the African congener in yellowish color of
feathering, but is similar in behavior and features of feeding.
This species of birds is discovered by Simon, the forum member.
Savanna
ndipinotherium (Ndipinotherium crassipygus)
Order: Damans (Hyracoidea)
Family: Ndipinotheriums (Ndipinotheriidae)
Habitat: Africa to the south and to the east from savannas of Sahara, Arabia;
plain district with alternating sites of savannas and woods.
Picture by Timothy Donald Morris
The ecological crisis connected to human activity had substantially
undermined biological variety of the Earth. And the ice age at the boundary
of Holocene and Neocene became an additional test for biosphere. As a result
the majority of specialized groups of animals had died out. Large animals, whose
populations in human epoch turned too small and isolated to provide a survival
and the further evolution, also had died out. But ones being “in a shadow” in
human epoch – small species of live beings – had got the main “prize” in struggle
for existence. Damans (Hyracoidea), small order of primitive hoofed mammals
of African origin, are one of such very perspective groups. From small burrowing
or climbing animals of primitive anatomy animals of several types of constitution
had descended: tree-climbing ashkokos similar to
lories, cursorial hyracolopes
and massive flathorns. Flathorns
are not unique group of giant descendants of damans. Their relatives are members
of original family of ndipinotheriums, large ground animals of Africa and nearest
areas of Asia.
“Ndipina” is the name of gorilla in some African dialects in human epoch. Savanna
ndipinotherium is similar remotely to this primate dyed out long time ago: it
has massive constitution, short back and rather long forward extremities. It
is a very large animal – standing on four legs ndipinotherium reaches three
meters at a shoulder, and about four meters length. Rising on hind legs, savanna
ndipinotherium can reach branches of trees at five-meter height.
In appearance and habit of life this animal is an original analogue of chalicotheres
of the past and of huge groundsloth
rodents from Patagonia contemporary to it. Savanna ndipinotherium is the
social animal migrating to long distances in large herds numbering up to 60
– 100 animals.
Body of savanna ndipinotherium is covered with rough and rather thin wool –
these animals live in warm climatic zone. Wool is mainly straw-coloured, and
on back there is an extended dark brown spot. Its shape may vary at different
individuals – from wide longitudinal strip along the back up to “shabrack” covering
crupper and hips. On shoulders of ndipinotherium there are also dark spots.
On throat and chest of animal white wool grows – it is a sign of sexual maturity,
and the throat of young animals is dark.
Rear legs of all species of ndipinotheriums are plantigrade and very strong.
The foot of daman, the ancestor of these animals, was covered with soft skin.
At ndipinotherium feet are cornified – it is an adaptation to migrating habit
of life. Large herbivorous species can not feed at the same place for a long
time: it depletes badly the food resources of the district. Due to strong muscles
this animal can easily rear, slightly supporting by forelimbs against tree trunks.
Claws of hinder legs are similar to elephant hooves, but they are stronger.
On hips of an animal the layer of fat using during the fodder shortage is accumulated.
Because of this feature this animal has specific epithet “crassipygus”, meaning
“fat-bottomed”. Ndipinotherium lacks tail at all.
Forepaws of ndipinotheriums combine supporting and grasping functions. Animal
has long hands; the third and fourth fingers are thick, strong and surrounded
with the common skin cover on which bottom side the cornified skin grows. During
the four-legged walking the animal supports on the bottom side of these fingers.
The second and fifth fingers of hand do not reach the ground. They are short,
but mobile – they may partly oppose to third and fourth fingers, operating similarly
to the thumb of human hand. With such paws animal turns in and grasps branches
of trees, which it browses. On forepaws of ndipinotherium small hooves similar
to nails grow.
Head of ndipinotherium is short, wide and rounded; neck is mobile. Ears of animal
are small. Eyes of ndipinotherium are located on sides of head, providing good
circular view. Sight of animal is good: alongside with huge giraffe
ostrich ndipinotherium is one of main “watchers” of savanna, targeting predators
from apart.
With the help of mobile lips ndipinotherium browses soft leaves from branches.
But when it is not enough forage for it, animal can equally easily cut off branches
and lignificated stalks up to 2 – 3 cm thick. It is possible due to the inheritance
received from damans – huge sharp incisors similar to rodent ones. If necessary,
animal defends against enemies by bites: it tries to grasp an attacking predator
by forepaws and to bite through its head or thorax. One bite is enough to kill
a predator comparable in size to lion of Holocene epoch. Due to huge size adult
animals have almost no enemies, and mainly juveniles or single animals suffer
from predators.
The rut passes very roughly – males roar, calling females and threatening contenders.
They drive competitors off from chosen females by impacts of shoulders and heads.
When fight becomes especially obstinate, forepaws may be used. Pregnancy at
ndipinotheriums lasts for about one year, therefore the period of rut in fact
coincides the time of cub birth.
In litter there is one cub only, but it is advanced in great degree: it is covered
with wool, opens eyes in some minutes after birth, and in half an hour after
birth can rise on legs and tries to walk. One day old cub does not remain behind
adults. It feeds on fat milk for about half-year, and keeps near to mother for
some months after. For this time young ndipinotherium reaches about a half of
height of adult animal. When the female becomes pregnant, she drives the grown
up cub off from itself, and young ndipinotheriums enter the most difficult period
of life: they should search for food independently. But, as a rule, in herd
there are some cubless females (“nurses”) caring of growing up animals a little.
Ndipinotherium becomes completely adult at the fifth year of life. Life expectancy
of this species in nature reaches 55 – 60 years. In old age the muzzle of animal
grows grey distinctly.
Close species of ndipinotheriums live in Africa:
Picture by Carlos Pizcueta (Electreel)
Coastal
ndipinotherium (Ndipinotherium littoralis) lives in narrow strip of
woods at the Atlantic coast of Africa. It differs from savanna neighbour in
small size, more gracile constitution and long extremities. Growth of animal
rearing on hind legs reaches 3 meters. This animal easily rises on hind legs
and can walk in such position for some tens of meters. Usually this feature
of behaviour is shown in courtship season.
Muzzle is narrower and more extended: animal eats rather soft leaves of bushes
and large grasses growing near water.
Animal is colored grey with dark irregular-shaped spots on sides and back legs.
Throat is white even at newborn animals.
It usually may be two cubs in litter at this species.
Picture by Alexander Smyslov
Mountain ndipinotherium (Ndipinotherium orobius)
inhabits highlands of Central Africa and its area is isolated from other species
of family. It differs in smaller size, stumpy constitution, rather short extremities
and rich wool of dark brown (almost black) color. It is the smallest species
of genus: growth of adult individual rearing on hinder legs does not exceed
2.5 meters. The tip of muzzle at adult animals is white, at males there often
may be a white spot on chest.
Animals have massive head and strong jaws: this species eats mainly rough grass
and branches of bushes.
Herbary |
Giant
manure mushroom (Copragaricus gigas)
Order: Gilled mushrooms (Agaricales)
Family: Agaricaceae (Agaricaceae)
Habitat: savanna of Northern Africa, manure heaps of ndipinotheriums.
Picture by Ilia
Ndipinotheriums and flathorns are very large descendants of
hyraxes living in African savanna. They partly replace elephants and rhinoceroses
extinct in Neocene, and are the animals forming a characteristic landscape of
savanna. Manure heaps of ndipinotheriums and flathorns represent the important
source of food for various invertebrates, and also a substratum for growth of
numerous mushrooms. From hyraxes, their ancestors, these animals inherited a
habit to leave dung in fixed place. Of course, this feature of behaviour was
transformed due to a nomadic way of life of these species. These animals evacuate
their intestines in special manure heaps which became an integral part of landscape
of African savanna of Neocene epoch.
As different groups of animals leave their dung in strictly fixed places, on
regularly renewing manure heaps steady biocenosis develops. Mushrooms actively
participating in decomposition of the vegetative mass undigested by animals
are a part of it. A large species of pileate fungi occupies the important place
among them: it is giant manure mushroom. Its fruiting bodies can be found on
manure heaps of ndipinotheriums and flathorns – this mushroom is quite “omnivorous”.
Mycelium of giant manure mushroom penetrates layers of manure of animals, avoiding
only the freshest manure. Fruiting bodies of this mushroom of white color and
similar externally to champignon develop on edges of manure heaps. Wide cap
of mushroom at first is egg-shaped with edges bent downwards and to stipe. For
the second day of growth of fruiting body it gets smoothed out, and thin film,
covering hymenium plates, is broken off at this time. Its part stays on stipe
of mushroom which continues growth in height. Hymenium of this mushroom has
reddish-brown color changing to black as time passes. At completely developed
fruit body of giant manure the height reaches 45 – 55 cm, and cap diameter reaches
up to 40 cm. Later cap turns curved inside, and wide plates of hymenium tear
to rags. The fruiting body of mushroom at the age of 4 – 5days starts decaying
and turns to sticky black mass. At this time flies and beetles fly to the rests
of mushrooms: they carry the spores sticking to their legs. Spores of this mushroom
have black color.
Giant manure mushroom is not poisonous, and some animals willingly eat its fruiting
bodies at various stages of development.
In savannas of Northern Africa there are some more related species of mushrooms:
Graceful
manure mushroom (Copragaricus gracilis) grows in groups of some tens
of small fruiting bodies. Its height is up to 25 – 30 cm, but the appearance
of fruiting body is absolutely different, rather than at the previous species.
The present mushroom has very thin and long stipe of pale yellow color on which
small cap of greenish color grows. It is a highly specialized species settling
only on manure of flathorn.
Indicating,
or termite-loving manure mushroom (Copragaricus indicator) lives only
on the manure processed by termites which is added to the structure of dung
termite nest. It had entered symbiotic relations with termites, and its fruiting
bodies are always connected to the nest of dung termites. Small fruiting bodies
of this mushroom grow on dwellings of termites innumerous groups. The height
of this mushroom reaches 6 – 8 cm; it has thin stipe and velvety brownish cap.
Termites eat a mycelium of termite-loving manure mushroom. But its benefit for
insects is not limited with it: the mycelium gives special properties to walls
of termite nest. Despite of thickness and durability, they turn porous, because
the mycelium dissolves the inclusions of manure added to the composition of
“mortar” for wall building. However, the presence of mushrooms in the termitary
has the underside. Fruiting bodies punch a roof of termitary in some places,
or grow at the edges of the nest. Because of it termites are compelled to repair
walls of nest permanently as fruiting bodies of mushrooms grow, to prevent the
appearing of cracks through which enemies can get into the colony.
Next |