A portrait of male Sumatran Orangutan. Orangutan is the most arboreal of the great apes. Unlike their relatives, orangutans spend most of the time in trees. A male orangutan can be distinguished from the female by size and appearance. The dominant males have a pair of cheek pad.
As the only great ape species in Asia, orangutans are now pushed into an extinction as a consequence of habitat loss and poaching. Both species, Sumatran Orangutan and Bornean Orangutan, are listed as critically endangered on IUCN Red List.