In addition they live in different areas and have physical differences. The Bornean has shorter darker hair. In addition the Sumatran Orangutan s cheek pads are slightly smaller than those of the Bornean. The Sumatran Orangutan is a large ape. At maturity the adult male Sumatran Orangutans will measure between four and a half and five feet in length.
Females are noticeably smaller averaging between three and four feet in length.
Captive bred Sumatran Orangutans will outweigh their wild counterparts. In comparison their legs are relatively short and weak. They have a dark red coat, which can range in color from orange red to black. Their coats are shaggy and thin. They have high foreheads, which lack the pronounced brow ridge seen in other primate species.