A century ago, wild populations of animals like the White Cheeked Gibbon were threatened by public and private zoo collectors, amongst the many who came to their forests and often killed whole families to retrieve one or two babies. Today, with their natural habitats in countries like Laos all but gone, the White Cheeked Gibbon would probably not exist at all without the help of zoos.

The Perth Zoo is one of the world's most successful breeders of these now so very rare gibbons :

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