Water is drunk from tree holes by dipping in a hand and sucking the water-drops that fall from its wrist. Characterized by long, shaggy, reddish-brown hair that can reach 20 inches. Bare face, with round eyes and small ears. Short, weak legs and long, powerful arms, curled fingers and feet, flexible shoulder and hip joints. Size usually determines the orangutan's sex since males are always much bigger.
Males also possess pouches of pebbly skin on chest.
An estimated 30,000 are still left in the wild. Unlike the gorillas and chimpanzees, the orangutans have a semi-solitary social system that evolved as a result of food distribution, and a lack of predators in the wild. As a result of their deficiency in balance, they walk on the palms of their hands similar to how human infants crawl. This quadrupedal locomotion hinders them from traveling fast and for long periods of time. Orangutans are similar to gorillas in the area of intelligence and communication due to their common ancestry.