They're such lousy swimmers that some zoos have stopped surrounding enclosures with moats –too many orang-utans have drowned.
The last time Emily Bland met Rishi the orang-utan, they were both still at the crawling stage.
The AD shows an office worker munching on a chocolate bar which turns out to be the bloody severed finger of an orang-utan.
They are now among the major drivers of deforestation in Indonesia and Malaysia, wrecking tens of millions of hectares of primary forest and driving orang-utans and other wildlife towards extinction
Renovation of the orang-utan enclosure was completed in January. Re-tiling of the fountain in the garden terrace was completed in July.
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