Page last updated at 12:15 GMT, Wednesday, 6 May 2009 13:15 UK

Crow astounds in more tool tests


Betty, a New Caledonian crow, astounded researchers with her tool-crafting abilities, first reported in the journal Science in 2002.

In this experiment, she is given a piece of bent wire. She then uses the edge of the tube to straighten it, making it long enough to reach a tasty treat.

Footage courtesy of the behavioural ecology group, Oxford University


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