Orangutans are the only apes that live in trees full time.
They have long, strong arms, so they can swing in the canopy layer of the rainforest.
They also have strong, short legs, and they have bendy hips to help them climb.
Orangutans have burnt orange (reddish-orange) coloured fur, and this helps them camouflage in the sunny red tones of the sunshine.
They also have dark eyes to protect them from sunlight.