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Page last updated at 08:42 GMT, Wednesday, 30 September 2009 09:42 UK

Monkeys 'reject vegetarianism'

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Wild howler monkeys have been caught on camera raiding chicken coops to steal the eggs inside.

The behaviour has surprised researchers as howler monkeys are thought to be exclusively vegetarian.

The egg-eating behaviour has evolved among a group of black and gold howlers living in a patch of forest in Rio Grande do Sul in Brazil.

Despite it being one of the best studied monkeys in the New World, this is the first time the species has been recorded eating animal matter (Video courtesy of Carina Barboza Muhle).

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