Orangutan: Key Facts & Natural History

Quick answer

Orangutans are large, intelligent great apes that live in the rainforests of Borneo and Sumatra, the only great apes found in Asia. They spend most of their lives in the trees, swinging through the canopy with long, powerful arms that can span over 2 m (7 ft), and they feed mainly on fruit. Known for their reddish hair and tool use, orangutans are critically endangered, with populations falling sharply due to deforestation. In the wild they can live 35 to 45 years.

By Kaiser Khan , Founder Last reviewed July 10, 2026 How we research & review

Key takeaway

Overview

Biology

Orangutan (Pongo pygmaeus) is classified as Mammal with conservation status Critically Endangered. Typical weight 30–90 kg (66–200 lb); lifespan around 35–45 years in the wild.

Ecology

Diet: Omnivore (mostly fruit). Habitat: Tropical rainforest canopy. Movement and social systems reflect those pressures.

People and this species

Learn before you travel or keep related pets. Wild individuals are not toys; captive care needs species-specific husbandry.

Behavior and intelligence

Orangutans are among the most intelligent animals, capable of using and even making simple tools, such as sticks to extract insects or leaves used as umbrellas and gloves. They are largely solitary compared with other great apes, with adult males living alone and females accompanied only by their offspring. They build a fresh nest of branches and leaves high in the trees to sleep each night. Their name comes from Malay words meaning "person of the forest."

Diet and feeding

Orangutans are omnivores whose diet is dominated by fruit, especially energy-rich figs and the spiky durian. They also eat leaves, bark, flowers, insects, and occasionally eggs. Because fruiting is patchy in the rainforest, orangutans range widely and remember the locations and seasons of fruit trees across large areas. By spreading seeds in their droppings, they help regenerate the forest.

Habitat and range

Orangutans live only on the islands of Borneo and Sumatra in Southeast Asia, where they inhabit tropical lowland and peat-swamp rainforests. They are the most arboreal of the great apes, spending almost all their time in the canopy and rarely coming to the ground. There are three species: the Bornean, Sumatran, and the recently described Tapanuli orangutan, all of which are critically endangered. Their survival is tightly linked to the health of intact forest.

Conservation

All orangutan species are Critically Endangered, with numbers falling rapidly due to logging, conversion of forest to palm oil plantations, fires, and the illegal pet trade. Females reproduce very slowly, giving birth only once every six to eight years, so populations recover poorly from losses. Conservation efforts include protecting and restoring forest, rehabilitating rescued orphans, and promoting sustainable palm oil. Without urgent action, wild orangutans face a real risk of extinction.

Research notes

Figures for orangutans (Pongo pygmaeus) come from field studies, museum records, and conservation assessments that do not always agree on exact averages. Prefer ranges over single-point claims, and check whether a source describes wild, captive, or mixed populations.

Practical takeaways

If you encounter orangutans in the wild, prioritise distance and local guidance. If you care for related domestic or captive animals, match diet and housing to species needs rather than generic pet advice. Share accurate status information (Critically Endangered) when discussing conservation.

Sources

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