They have been replaced by plantations that are too nutrient-poor to support such wildlife, instead dedicated solely to producing fruit that is pulped to make oil used globally in products ranging from food to fuel.
A palm oil tree can yield useable fruit in three years and continue doing so for the next 25 years. But such wealth creation has meant environmental destruction. "We don't see too many orangutans any more", said a worker with a weather-beaten face, taking a break in the shade of a hut built on a path gouged out of the forest floor.
Experts believe there are about 50,000 to 60,000 orangutans left in the wild, 80 percent of them in Indonesia's Borneo and the rest in Malaysia. Exact data on their decline is hard to come by, say primatologists.
"What we see now is a contest between orangutans and palm oil for a home," said Sri Suci Utami Atmoko from National University in Jakarta. "You can judge that the population is depleting from the loss of orangutan habitats."….