Sumatran orangutans are found in primary tropical lowland forests, including mangrove, swamp forests, and riparian forests. They live almost completely in the trees, building nests in which they nap or sleep for the night. Preferred elevations are 200 to 400 m, the area in which their preferred fruiting trees occur, but Sumatran orangutans can be found up to 1,000 to 1,500 m.
Range elevation: 200 to 1,500 m.
Habitat Regions: tropical ; terrestrial
Terrestrial Biomes: rainforest
Other Habitat Features: riparian