Nyaru the orangutan is off to 'jungle school' to prepare to live in the wild

Eight-year-old male primate will leave Perth zoo for sanctuary on Indonesian island of Sumatra where, at his own pace, he will be released

Nyaru has been learning to fast between meals. On Tuesday the eight-year-old male orangutan will leave his enclosure in Perth zoo for the Indonesian island of Sumatra, where he will be released into the wild.

An erratic feeding schedule, intended to mimic the "boom and bust" cycle of natural fruit availability, is one of the ways zookeepers have helped him to prepare.