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Rooks behaviour study gets underway

1 July 2014 Last updated at 10:51 BST

People are being asked to help study the behaviour of some of our cleverest garden birds, rooks.

The British Trust for Ornithology say rooks have already demonstrated remarkable abilities to solve puzzles and use tools in laboratory studies.

Now the group wants members of the public to report their observations of how the birds use their skills in the wild.

Victoria Gill reports.

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