The Leuser Ecosystem is a UNESCO World Heritage Site in northern Sumatra and one of the largest single continuous blocks of tropical rainforest left in the whole of south-east Asia. It is also home to the orangutan, one of the region’s most endangered species. Despite Leuser’s World Heritage status

The Sumatran orangutan (Pongo abelii) is one of the three species of orangutans. Found only in the north of the Indonesian island of Sumatra, it is rarer than the Bornean orangutan but more common than the recently identified Tapanuli orangutan, also of Sumatra.

The orangutans (also spelled orang-utan, orangutang, or orang-utang) are three extant species of great apes native to Indonesia and Malaysia. Orangutans are currently only found in the rainforests of Borneo and Sumatra.

Time is running out for the only Asian ape, the orangutan. Facts for kids about orangutans and reasons they are Critically Endangered.

Urgent Appeal URGENT APPEAL to protect 150,000 acres of tropical forest, home to more than 500 critically endangered orangutans. We only put out appeals when there is a real need for help – and right now, we urgently need funds to strengthen the protection of the Lamandau Wildlife Reserve, habitat of the critically endangered Bornean orangutan.