Page last updated at 08:46 GMT, Wednesday, 1 April 2009 09:46 UK

Baby chick looks for hidden ball

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Baby birds can do arithmetic, say researchers in Italy.

In this footage, watch a baby chick hunt for a hidden ball in an experiment developed to investigate the chick behaviour.

The test shows how the young chick will follow a familiar object, seeking out the ball when it is hidden from view.

Subsequent experiments revealed how the chicks can add and subtract objects as they were moved behind two screens.

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