They live alone in large territories. The only long-lasting orangutan social group is the mother and offspring, who live together for about 7 years. When mating, the male and female orangutan stay together for only a few days. These nests are made out of leaves and branches. Nests are shared by a mother and her nursing offspring.
Orangutans often nap in the afternoon after a morning spent obtaining food.
These calls help the male claim his territory, call to females, and keep out intruding male orangutans. Males have a large throat sac that lets them make these loud calls. Orangutans do not swim. They are the only great ape from Asia. They are found in tropical rain forests in northern Sumatra, Indonesia and in low-lying swamps in Borneo.