An impala (Aepyceros melampus Greek ?????, aipos "high" ?????, ceros "horn" + melas "black" pous "foot") is a medium-sized African antelope. The name impala comes from the Zulu language. They are found in savannas and thick bushveld in Kenya, Tanzania, Mozambique, northern Namibia, Botswana, Zambia, Zimbabwe, southern Angola, northeastern South Africa and Uganda (the source of that country's capital city's name - Kampala).

Appearance

Average mass for an Impala is approximately 75 kilograms. They are reddish-brown in color with lighter flanks, have

Impala ram from the Kruger National Park, South Africa.

Ecology

Impala are among the dominant species in many savannas. They can adapt to different environment by being grazers in some areas and browsers in others. They graze when the grass is green and growing and browse at other times. They will browse on shoots, seedpods and foliage.

Herds will use specific areas for their excrement. Impala are active during both day and night and are dependent on water. A herd is normally an indicator of water close by. Impala can thrive in areas where pure grazers can not survive.

Impala ewe from the Kruger National Park, South Africa.

When frightened or startled the whole impala herd starts leaping about in order to confuse their predator. They can jump distances more than 9 meters (30 ft) and 2.5 meters (8 ft) high. Leopards, cheetah, Nile crocodiles, lions, spotted hyenas and wild dogs prey on impala.

Social structure and reproduction

Females and young form herds of up to two hundred individuals. These large herds are noted for a complete lack of aggression, synchronized activities, and great variation in the composition of the herd, as members come and go daily. When food is plentiful, adult males will establish territories and round up any female herd that enter their grounds and will chase away bachelor males that follow. They will even chase away recently weaned males. A male impala tries to prevent any female from leaving his territory. Males also prefer to return to the same territory they held before. Most instances when a territory-holder is deposed is when a former territory-owner of the same area overthrows the current resident. During the dry seasons, territories are abandoned as herds must travel farther to find food. Large, mixed tranquil herds of females and males form.

Young male impala who have been made to leave their previous herd form bachelor herds of around thirty individuals. Males that are able to dominate their herd are contenders for assuming control of their territory.

Impala grazing in Maasai Mara, Kenya

Impala leaping in Kenya

Taxonomy

In the past, taxonomists have put the impala in the same tribe as gazelles, kobs and hartebeests. However it was found that the impala was so different from any of these tribes that it was put in its own tribe, Aepycerotini respectively.

There are three subspecies:

• Black-faced Impala Aepyceros melampus petersi
• East African Impala Aepyceros melampus rendilis
• Southern Impala Aepyceros melampus melampus

References

• Estes, R. (1991). The Behavior Guide to African Mammals, Including Hoofed Mammals, Carnivores, Primates. Los Angeles, The University of California Press
• African Wildlife Fundation - Impala
• Arkive - Impala

External links

• Impala: summary from the African Wildlife Foundation

<gallery> Image:Impala leaping from water.jpg|Impala leaping from the water Image:impala.JPG|A group of impala in South Africa Image:Aepyceros_melampus.png|Impala in Zambia Image:Animaux1.jpg|Male impala </gallery>

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