Orangutans are the species of great ape along with gorillas, chimpanzees and Bonobos Orangutan becomes the only ape which remains in Asia while gorillas, chimpanzees and bonobos can be found in Africa. There are now two accepted species of orangutan – the Sumatran Orangutan ( Pongo abelii) and the Bornean Orangutan ( Pongo pygmaeus).
Orangutan greatest habitats in Sumatra are the alluvial forest patches in lowland river valleys and in the freshwater and peat swamp forests in floodplains. The orangutan is the largest arboreal animal means Orangutan spend almost all of their times on the tree and rarely to go down. Orangutan is well adapted with their environment that they have long hands and feet and has very mobile shoulder and hip joints to move from one tree to another tree.