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African
Savanna Elephant
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African
Savanna Elephant (Loxodonta africana cyclotis)
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Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Proboscidea
Family: Elephantidae
Genus: Loxodonta
Species: L. africana
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Distribution
Map
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Conservation
Status:
Vulnerable
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The
African Savanna Elephant is a
colossal animal, with a great intelligence and proverbial
memory. Also known as the bush elephant or African bush elephant,
it's the best-known of the two African elephants (the other
being the forest elephant).
The largest of all land animals, the savanna
elephant normally reaches 6 to 7.3 m in length and 3 to 3.5
meters in height, although a 4-meter elephant, whose body
is dissected in the Museum of Natural History in Washington,
D.C., was discovered in Angola in 1955. It weights between
5,000 and 10,000 kg, and eats up to 300kg of grass, leaves,
shoots, flowers, and bark each day (along with some 200 litres
of water per day). In spite of its huge mass, it can it can
reach a top speed of 40 km/h when scared or upset (although
its normal rate is of 6 km/h).
The animal is characterized by its large
head; two large ears that cover its shoulders and radiate
excess heat; a large and muscular trunk; two prominent "tusks"
(incisors), which are well-developed in both sexes, although
more commonly in males; a short, almost nonexistent neck;
a large, barrel-like body; four long and heavy legs that resemble
columns; and a relatively short tail. Elephants are protected
by a heavy but flexible layer of gray-brown skin, dotted with
mostly undeveloped patches of hair and long, black hair at
the tip of its tail. The trunk is the most characteristic
feature of the savanna elephant. It is formed by the fusion
and elongation of the nose and upper lip, forming a flexible
and strong organ made purely of muscle.
African Elephants are vegetarian animals.
The diet of a savanna elephant varies according to its habitat;
elephants living in forests, partial deserts, and meadows
all eat different proportions of herbs and tree or shubbery
leaves. In order to break down the plants they consume, savanna
elephants have four large molars, two in each mandible of
the jaw. Each of these molars is 10 cm wide and 30 cm long.
Over time, these molars are worn away and new ones are grown
to replace them as the elephant ages. Around the age of 15
their milk teeth are replaced by new ones that last until
the age of 30, and then by another ones which wore off past
the age of 40, being replaced by the last teeth that last
approximately until the age of 65, 70 at longest. Not much
later, the animal dies of starvation not being able to feed
correctly. There are known cases of over 80 year old specimens
in captivity.
The savanna elephants are notably inteligent
animals. In fact, experiments about reasoning and learning
applied on them show that they are the smartest ungulates
together with their asian cousins. This is mostly due to their
large brain, house of the famous 'elephant memory'. Furthermore,
elephants are one of the few animals that show recognition
of one another even after death. When an old elephant dies
the rest accompanies her in that difficult journey and stay
by the corpse for a while. Females have even been reported
to stand watch over their dead young and cover the body with
branches and twigs. The famous Elephant Graveyards are a myth,
though, but it is true that these animals can recognise a
carcass of its species when they find one during their trips,
and even if its a stranger, they form around it and sometimes
they even touch its forehead with their trunk.
Packs are made up of related females and
their younglings of assorted ages, directed by the eldest
female, called the matriarch. In occasions an adult male goes
with them, but those usually leave the pack when reaching
adolescence to form packs with other elephants of the same
age. Later, they spread out, carrying out a lonely life, approaching
the female packs only during the mating season. The matriarch
is the one who decides the route and shows to each other member
of the pack all the water sources she knows, which the rest
will memorize in the future. The relations among the members
of the pack is very tight; when a female gives birth to a
baby the rest go to acknowledge it touching her with the trunk.
The mating happens when the female feels
ready, an event that can occur anytime during the year. At
that moment she starts emitting infrasounds that attract the
males, sometimes many kilometers away. The adult males start
arriving to the pack during the following days and begin fighting
head-to-head between them, causing some injuries and even
broken tusks. The strongest, triunphant, mates with the female
(in case she accepts him, shown by rubbing her body against
his), and then both get apart and go its own way. After 22
months of gestation (the longest among mammals), the female
gives birth to a single 90cm-high baby who weighs more than
100 kg. The baby sucks the mothers milk until the age of 5,
but it also eats solid food from the 6 months. Just a few
days after the birth he can follow the pack by foot, so then
can the pack resume its course.
The adult savanna elephant lacks predators
thanks to its great size, but the younglings (specially the
newborn) are vulnerable to lions',
leopards',
crocodiles' and, more rarely, hyenas'
attacks. This predation and the lack of water in drought seasons
cause a considerable infant mortality in this species, in
spite of the efforts made by all the females of the group,
who usually attack any dangerous animal who dares to approach
them. Amongst all the species, savanna elephants show special
aversion towards rhinoceros,
even so that they attack them at first sight. The behaviour
can be observed mostly on males, especially the younger ones,
and there have even been cases of 'murdering' adolescents
who seemed to enjoy this kind of fights.
With excerpts from Wikipedia's
African Savanna Elephant page.
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Mara Animals
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