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7 April 2011, 14:39 | Updated: 7 April 2011, 15:46
Monkeys at London Zoo are being taught not to steal sunglasses after a group of them have started taking them off the heads of visitors to the zoo.
The Bolivian squirrel monkeys have built up a stash of designer shades, so now keepers are giving them sunglasses coated with a bitter tasting apple substance to hopefully put the monkeys off.
4 years ago keepers had to teach them not to steal mobile phones.