Sumatran Orangutan
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[Photo] dave 59 (http://en.wikipedia.org/wiki/User:Dave59) took it at the Orang rehabilitation centre, Buket Lawang ,Sumatra.

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The Sumatran Orangutan (Pongo abelii) is the rarer of the two species of orangutans. Living and endemic to Sumatra island of Indonesia, they are smaller than the Bornean Orangutan. Baby Sumatran Orangutans are often poached as highly prized Zoo Inhabitants, and the poachers often kill the baby's mother for no apparent reason. The Sumatran Orangutan is only found north of Lake Toba.

The Sumatran Orangutan grows to about 4.6 feet tall and 150 pounds in males. Females are much smaller than males. It is predominantly solitary, and males are territorial towards other males. This species is more dependent on fruit than the Bornean type. It is truely arboreal and moves through the trees by brachiating. In the wild it may live 35 to more than 40 years an captives may live to be 60.

NHNZ filmed the Sumatran Orangutan for its show Wild Asia:In the Realm of the Red Ape, it showed one of them using a simple tool, a twig, to prise food from difficult places. There is also a sequence of an animal using a large leaf as an umbrella in a tropical rainstorm. Such tool-using behaviour (see animal cognition) is well documented in other animals, but this film remains unique.

http://en.wikipedia.org/wiki/Sumatran_Orangutan

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