Orangutan (Orang-utan) Pongo pygmaeus/abelii/tapanuliensis

The critically endangered Orangutan (also Orang-utan) suffers habitat loss (including deliberate forest fires and clearance for palm oil) and poaching in its remaining native areas of Borneo and Sumatra. They are "great apes", the only non-human great apes not native to Africa. They are close to human DNA and highly intelligent, possibly more so than Chimpanzees and Gorillas.

Split into two species in 1996, P. pygmaeus (above) is native to Borneo and P. abelii to Sumatra. A third species, the Tapanuli Orangutan, P. tapanuliensis, from a small region of Sumatra, was described in 2017. The Bornean has darker hair, fatter male face flanges and spends more time on the ground. Both Sumatran and Tapanuli have more golden orange hair, rounder/flatter male face flanges and spend more time in trees (out of reach of tigers). Tapanuli has aspects of both Sumatran and Bornean; there are only a few hundred left, vulnerable to further deforestation, capture and inbreeding.

"Orang utan" means man of the forest. They are adept at tool use and build elaborate nests in the trees to sleep at night. Diet is mainly fruit but they use twigs to reach termites and larvae. It is said that they have watched humans cross a river in boats and copied untying a boat and crossing on their own.

Unlike the other Great Apes, Orangutans are, appropriately, orange (coppery brown or ginger). Their armspan (some 7 feet or 2 metres for adult males) is greater than their height (male c. 4.5 ft/1.4 m).

They spend most of their time in trees. The adult males have throat sacs which can make calls travel for some 1.2 miles (2 km) through the forest.

The least social of the great apes, they are generally solitary or mothers with single offspring which stay with her 6-7 years; she may breed at 8 year intervals. They live for some 50 years in the wild.