The Tapanuli orangutan is a critically endangered species of orangutan that can be found only in South Tapanuli in the island of Sumatra in Indonesia. It is one of three known species of orangutan, alongside the Sumatran orangutan, found farther northwest on the island, and Bornean orangutang. Tapanuli orangutans resemble Sumatran orangutans more than Bornean orangutans in body build and fur color. However, they have frizzier hair, smaller ...
heads, and flatter and wide faces. Dominant males have prominent mustaches and large flat cheek pads, known as flanges, covered in downy hair. Both male and female Tapanuli orangutans have beards and as with the other two orangutan species, males are larger than females.
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