Bornean orang-utan  (Pongo pygmaeus)

Fossil evidence suggests that orang-utans were once widely distributed in South East Asia, but the Bornean orang-utan is today restricted solely to the island of Borneo with the largest population located in Kalimantan, the Indonesian part of the island (8). Three subspecies are recognised; P. p. pygmaeus ranges from northwest Kalimantan to Sarawak, P. p. wurmbi occurs on southwest Kalimantan, and P. p. morio can be found on northeast Kalimantan to Sabah (1) (7).

Mainly inhabits lowland and hilly tropical rainforests (2), up to 800 meters above sea level (7).