The Bornean orangutan is an orangutan species endemic to the island of Borneo. It belongs to the only genus of great apes native to Asia and is the largest of the three Pongo species. It has a coarse, reddish coat and up to 1.5 m long arms. Current estimates suggest that there are fewer than 55,000 Bornean orangutans left in the wild and only around 13,600 Sumatran orangutans remaining. This staggering decline is largely attributed to habitat destruction caused by logging and palm oil plantations. Generally, Sumatran orangutans are lighter in color, have longer body hair and less pendulous throat sacs than Bornean orangutans, but the only reliable way to tell the difference between Sumatran and Bornean orangutans is by looking at their chromosomes.