Orangutan
The only great ape that lives on the Asian continent, the orangutan is found on the Malaysian islands of Borneo and Sumatra. Its name means "man of the forest," and it is one of thousands of species of wildlife that live in tropical Asian forests. The orangutan's story is similar to that of a large number of Asian animals: its forest habitat is being rapidly destroyed by conversion to agriculture, both by large commercial plantations and smaller subsistence farms. At the same time, humans are killing the orangutan's prey species (birds and small mammals) for food and capturing it for the pet trade. There are an estimated 30,000 orangutans left in the wild, about 20,000 on Borneo and under 10,000 on Sumatra. Orangutans are the most arboreal (living in trees). It is rare for an adult orangutan to ever touch the ground. Their strong hands, hand-like feet, and long arms (with a span of up to 8 feet) are supremely adapted to life in the trees. They do not even have to come to the ground to drink -- they drink the water that collects in tree holes. Orangutans are omnivorous; they eat both plants and animals. They eat fruit, leaves, nuts, shoots, insects, and, when they can catch them, young birds and small mammals. By about the age of ten, an orangutan will have learned to identify over 200 different food plants. Orangutans spend most of their lives alone. The males are very territorial, and each male's territory overlaps those of several females. Because orangutans do not tolerate each other very well, they need large areas of forest to survive. Crowding causes them to fight among themselves, possibly over the limited supply of fruit.

Extracted from : http://www.bagheera.com/inthewild/van_anim_orang.htm