Bornean orangutans (Pongo pygmaeus) are an endangered great ape found only in Borneo. No orangutans live in the southeastern portion of the island, and there are three subspecies found in the northwest, northeast and central regions. Northwest Bornean orangutans are the smallest, most threatened population, with only approximately 1,500 individuals remaining, while central Bornean orangutans are the largest group, comprising about 35,000 members.