Orangutans are 200 pounds, and have very heavy bodies. Orangutans are the largest arboreal mammal. Arboreal means living in trees. Habitat Requirements Orangutans live in the tropical rainforests of Borneo and Sumatra. Orangutans build crude nests, and they are the only animals who build a roof when it rains.
Orangutans live in the canopy of the rain forest.
Adaptations Orangutans are much like humans, and they are very intelligent. They are tree dwelling animals. When they travel through trees, they don't move to the next branch until they have a firm grip on it. Orangutans often drop seeds while they are traveling though trees. That makes more food for them.