Supporting Online Material


Full TextShaping of Hooks in New Caledonian Crows
Alex A. S. Weir, Jackie Chappell, and Alex Kacelnik

Supporting Online Material


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  • Movie 1   size = 1,290KB
    Wire-bending behavior by a captive New Caledonian crow. This movie clip shows the seventh trial of the experiment, in which the female New Caledonian crow uses sticky tape on the side of the apparatus to bend straight wire and subsequently uses this bent wire to retrieve a bucket containing meat. At the beginning of the clip, she is already holding the straight wire in her beak, as she picked it up at the start of the trial but was immediately displaced by the male crow. Movie clips of all trials are available by request from the authors.