Chocolate was discovered as a baby, by members of WildLife Asia, being illegally held by wildlife traders in a village on the outskirts of the Tripa peat forest, Aceh. The traders told them: ‘We identify the mothers with babies, then cut down the trees around them, leaving them with nowhere to run. Then we beat the mother close to death until she falls to the ground. Only when she is unconscious can we prise the infant from her grasp.’ Baby orangutans fetch up to 2m Rupiah, normally sold to Chinese businessmen.

Photograph: Paul Hilton/WildLife Asia