The name orangutan comes from the Malay word "orang hutan," which literally means "man of the forest." Orangutans These mammals spend most of their time in the trees searching for food. Orangutans live in primary and secondary forests. Although they can be found at altitudes of over 1,500 meters, they primarily inhabit lowland areas and prefer river valley forests or floodplains. The orangutan now survives only on Borneo and Sumatra. Its disappearance is due to deforestation, hunting, industrial oil and rubber plantations, mining, urban expansion, forest fires and illegal trafficking.