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Nature. 2001 Dec 13;414(6865):707.

Animal behaviour: Laterality in tool manufacture by crows.

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1
Department of Psychology, University of Auckland, Auckland 92019, New Zealand. grhunt10@hotmail.com

Erratum in

  • Nature 2002 Feb 7;415(6872):602.

Abstract

New Caledonian crows (Fig. 1) fashion tapered tools from either the left or the right edge of the long narrow leaves of pandanus trees or screw pines, which they use to extract invertebrates in rainforest vegetation. Although right-handedness is thought to be uniquely human, we show here that crows from different localities display a widespread laterality in making their tools, indicating that this behaviour is unlikely to be attributable to local social traditions or ecological factors. To our knowledge, this is the first demonstration of species-level laterality in manipulatory skills outside humans.

PMID:
11742382
DOI:
10.1038/414707a
[Indexed for MEDLINE]
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