African Elephant/Loxodonta africana:
The African
elephant is the largest and most powerful of all living land
mammals. It is also one of the most gentle and social of all
animals, living in peaceful family units. The African Elephant
occurs as two subspecies: The Savanna Elephant L. a. africana, and
the smaller Forest Elephant L. a. cyclotis.
Size:The size of the
African elephant usually depends on its subspecies. A bull ( male)
of a Forest Elephant has
a shoulder height of 160 to 286cm in males, while the females are slightly smaller witha
height of 160 to 240cm.
The size of a Savannah Elephant is a little
bigger and males have a shoulder height of 300 to 400cm while
females are roughly 240 to 340cm.
However, both subspecies of the African elephant usually share
the same length of about 600 and 750cm. The African elephant has
tail with a length of 100 to 150cm.
Weight: Bulls weigh approximately 4000- 6300kg, the cows
relatively less at 2400 –4000kg.
Distribution: The African elephant is found in almost all
habitats including savannah, rain forest, swamps, deserts, seashores
and high mountains. The elephant is still relatively widely
distributed, though fragmented, ranging from the south of the Sahara
desert. In the past, African elephants were found throughout Africa.
Appearance: Besides its greater size, it differs from the Asian
elephant in having larger ears ( used as fans to create a stream of
air over the elephant's body) and tusks, a sloping forehead,
and two "fingers" at the tip of its trunk, compared to
only one in the Asian species.In both sexes, the two incisor teeth
of the upper jaw grow to form tusks, and it is for this ivory, used
at one time in the manufacture of piano keys, billiard balls, and
other objects, that hunters have slaughtered thousands of these
magnificent animals.
There is also something special about the teeth of the African elephant. There are only 4-1 in
each quarter of the jaw. Each one is 30cm long and is usually
replaced 6 times. Soft soles are also present to act as cushions to
enable the elephant to carry its great weight almost
noiselessly.
Behavior: The African Elephant is gregarious, sometimes being
found in herds of hundreds or even thousands of individuals. They
live in herds based on breeding groups of females and young. Cows
and calves live in family units, underathe leadership of a mature
cow to whom every group member is related.A young bull is driven out
when he is sexually mature and joins other young males to form
bachelor herds. Adult bulls live alon e and join a family unit only
briefly when a female is ready to mate.
Although an African elephant herd may wander great distances, it
neverr moves far from water. It needs this not only for drinking,
but also for bathing which it likes to do every evening.
After bathing, the African elephant ‘dusts’ its wet
skin with dry soil or mud. This coating helps to protect it from
ceaseless, irritating attacks of biting insects.
When foraging for food, the African elephant communicates a sense
of well-being by making a rumbling noise. If an elephant senses
danger, it alerts the herd by ceasing to make these sounds.
Diet: As vegetarians, elephants require much food, sometimes
consuming more than 225 kg of plant matter a day. But as elephants
have an inefficient digestive system, they digest only about 40 per
cent of what they eat.Their trunk is employed to pull branches off
trees, uproot grass, pluck fruit, and to place food in their mouths.
The trunk is also used for smell, touch and in drinking, greeting or
throwing dust for dust baths.
Lifespan: About 70 years.
Reproduction: Bulls reach a sexual maturity at 14-15 years while
cows at 8-10 years. Till now, there is no distinct mating season for
the African elephant. A single young is usually produced after about
22 months of gestation.
Why is it endangered: The African elephant has become very rare
and endangered mainly due to kthe loss of habitat through
desertification and growth of human populations; and the demand for
ivory. Although it is banned now, illegall trading in ivory still
occurs largely.
Conservation: There are no recent total estimates
available. The 1990 IUCN/SSC Action Plan gave an estimate of 610,000
African Elephants.The African elephant is now endangered. Hunting
and trading in ivory is now banned, but stil occurs illegally.
There is one mystery about the
purpose of a scent gland found on the chests of mandrills. Males in
particular like to embrace a tree and rub up and down against it to
deposit scent. They all do it, but scientists haven't got the
faintest idea why. It may be that, given their large home ranges,
the males are somehow communicating through these marks. The
scientists suspect they might also use their bright colors for
visual forms of communication.