Why Are Orangutans Endangered? Palm Oil and Forest Loss

How endangered are orangutans?

The IUCN Red List rates all three orangutan species as Critically Endangered, its highest threat category before extinction in the wild.

Population numbers come from counts of sleeping nests along survey routes and are estimates with wide margins. Higher figures in recent years partly reflect better surveys of areas that had not been counted before, not real increases. A study published in 2018 calculated that Borneo lost more than 100,000 orangutans between 1999 and 2015.

Forest loss for plantations and logging

Habitat loss is the biggest single threat. Orangutans need large areas of tall, fruit-rich forest, and the lowland and peat swamp forests where they are most common are also the easiest to log and convert to plantations.

Indonesia and Malaysia together produce most of the world’s palm oil, an ingredient found in many foods, cosmetics, cleaning products and biofuels. Large areas of Borneo and Sumatra have been turned into oil palm plantations since the 1980s, and pulpwood plantations for paper have replaced more forest. Logging, mining and small-scale farming also play a part. Even where some forest remains, roads and plantations split it into fragments too small to support orangutans for long.

Fires and peatland drainage

Peat swamp forests grow on deep layers of waterlogged plant material. When they are drained for agriculture, the dry peat burns easily and can smolder underground for weeks. In drought years linked to El Niño, such as 1997–98 and 2015, huge fires in Kalimantan and Sumatra destroyed large areas of orangutan habitat and killed or displaced many animals.

Killing, conflict and the pet trade

Orangutans are also killed directly. People hunt them for meat in some areas, kill them when hungry orangutans raid crops or plantations, and shoot mothers so their infants can be taken and sold as illegal pets. A large interview survey in Kalimantan estimated that between 750 and 1,800 orangutans were killed in a single year in the late 2000s.

Because killing a single adult female removes a mother and many years of future births, even low levels of killing can push populations into decline. Orphaned infants that survive capture need years of care in rehabilitation centers before they can be returned to the forest, and not all of them can ever live wild again. Displaced orangutans that wander into villages and plantations after their forest is cleared are especially likely to come into conflict with people.

Why slow breeding makes things worse

Orangutans have one of the slowest life histories of any mammal. Females usually have their first baby at about 15 years of age and then only one infant every 6 to 9 years, because each young stays with its mother for many years. A female may raise only four or five offspring in her lifetime.

This means populations need decades to recover from losses. Scientists estimate that a population can decline if more than about 1% of adult females are removed each year. Read more in how long do orangutans stay with their mothers?

Special threats to the Tapanuli orangutan

The Tapanuli orangutan lives only in the Batang Toru forest in North Sumatra, in an area of about 1,000 km² (390 sq mi). Its tiny, fragmented population is threatened by road building, small-scale farming, mining and a hydroelectric project in its range, and inbreeding is a long-term risk. In late 2025, floods and landslides after a tropical cyclone hit parts of its habitat. With so few animals, any extra loss matters. Learn about the three species in how many orangutan species are there?

The palm oil debate

Because oil palm yields much more oil per hectare than crops such as soybean, rapeseed or sunflower, replacing it could need even more land. Many conservation groups therefore campaign for palm oil that is certified as deforestation-free, for protection of remaining forests and peatlands, and for better land-use planning, rather than a complete boycott. Critics point out that certification has not always stopped forest clearing, so the debate continues.

What is being done to save orangutans?

Orangutans are protected by law in Indonesia and Malaysia and listed on CITES Appendix I. Key conservation measures include protecting large forest areas such as Gunung Leuser, Sabangau and Danum Valley, restoring degraded forest and peatland, creating corridors between forest patches, reducing conflict with farmers and enforcing laws against killing and trade. Rescue and rehabilitation centers care for orphaned orangutans and return some to protected forests, although protecting wild forests remains far more effective than rescuing animals after the forest is gone.