The Sumatran Orangutan (Pongo abelii) is the rarer of the two species of orangutans. Living and endemic to Sumatra island of Indonesia, they are smaller than the Bornean Orangutan. The Sumatran Orangutan grows to about 4.6 feet tall and 200 pounds in males. Females are smaller, averaging 3 feet and 100 pounds.
Compared to the Bornean Orangutan, the Sumatran Orangutans possess a lighter and longer pelage, a longer face, a smaller stature, and flanges that are covered in small white hairs.
Filed under: CRITICALLY ENDANGERED