The Bornean orangutan, Pongo pygmaeus is a species of orangutan native to the island of Borneo. It is slightly larger than the other species of orangutan, the Sumatran orangutan. The Bornean orangutan is more common than the Sumatran, with about 45,000 individuals existing in the wild. There are only about 7,500 of the Sumatran species left in the wild. Orangutans are becoming increasingly endangered due to habitat destruction. Many orangutans are killed so that their babies can be captured and put in zoos. The Bornean orangutan has a life span of about 35 to 40 years in the wild. In captivity, it can live to be 60.
The Bornean Orangutan is more solitary than the Sumatran Orangutan. Two or three orangutans that have overlapping territories may interact for small periods of time. Babies stay with their mothers until they are about 8 or 9 years old. Orangutans have a long childhood compared to other apes.