Bornean - Pongo pygmaeus
Sumatran - Pongo abelii
Distribution: restricted to the islands of Borneo, Malaysia and Sumatra, Indonesia.
Habitat: dense tropical rainforest.
Description: heavy, rather human-like body. Very long arms, grasping hands and feet. Dark grey skin and reddish hair.
Population and IUCN Red List Status:
Bornean - 45,000-69,000 - Endangered
Sumatran - 7,300- Critically Endangered
Size: Height: males 1.4 m, females 1.15 m.
Weight: males 90-120 kg, females 40-50 kg.
Life-span: estimated average of 35 years. 50 years or more in captivity.
Food: tropical fruits, leaves, shoots, bark, insects and eggs.
'Orang' and 'utan' are the Malay words meaning 'person' and 'forest'; the orangutan is literally a 'person of the forest'. Apart from humans, the orangutan is the only one of the five great apes - the orangutan, the gorilla, the common chimpanzee, the bonobo (pygmy chimpanzee) and human - to live outside Africa and is the largest tree living mammal in the world. It is less closely related to humans than the other three great apes, but is still strangely human-looking.
The two sub-species living in Borneo and Sumatra differ a little in appearance. Sumatran orangutans are generally slimmer and lighter-coloured than their Bornean counterparts. The Bornean male has larger cheek pads than the Sumatran, which gives it a more grotesque appearance.