Page last updated at 07:41 GMT, Tuesday, 26 May 2009 08:41 UK

Clever rook opts for two tools


Rooks have a remarkable aptitude for using tools, scientists have found.

Tests on captive birds revealed that they could craft and employ tools to solve a number of different problems.

The findings, published in the Proceedings of the National Academy of Sciences, came as a surprise as rooks do not use tools in the wild.

Here, a rook uses two tools in succession to retrieve a snack.

Video courtesy of Christopher Bird, University of Cambridge


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