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New Caledonian crows ( Corvus moneduloides ) attend to barb presence during pandanus tool manufacture and use

New Caledonian crows ( Corvus moneduloides ) attend to barb presence during pandanus tool... New Caledonian crows craft wooden hook tools and incorporate naturally occurring barbs into the leaf tools that they manufacture. This raises the question as to whether, or to what degree, these birds are sensitive to the hooks on their hooked and barbed tools. Past research in this area has provided equivocal results. We tested whether New Caledonian crows attend to the presence and orientation of barbs on pandanus leaves and tools during tool manufacture and selection tasks. Our results show that New Caledonian crows attend to barb presence during both pandanus tool manufacture and use, but do not attend to barb direction during pandanus tool use. We conclude that task context, the time and energetic costs of attending to barbs, relative foraging efficiency, and different experimental designs may influence whether, and to what degree, NC crows attend to pandanus barbs. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

New Caledonian crows ( Corvus moneduloides ) attend to barb presence during pandanus tool manufacture and use

Behaviour , Volume 152 (15): 2107 – Jan 1, 2015

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References (18)

Publisher
Brill
Copyright
Copyright 2015 by Koninklijke Brill NV, Leiden, The Netherlands.
Subject
Regular articles
ISSN
0005-7959
eISSN
1568-539X
DOI
10.1163/1568539X-00003316
Publisher site
See Article on Publisher Site

Abstract

New Caledonian crows craft wooden hook tools and incorporate naturally occurring barbs into the leaf tools that they manufacture. This raises the question as to whether, or to what degree, these birds are sensitive to the hooks on their hooked and barbed tools. Past research in this area has provided equivocal results. We tested whether New Caledonian crows attend to the presence and orientation of barbs on pandanus leaves and tools during tool manufacture and selection tasks. Our results show that New Caledonian crows attend to barb presence during both pandanus tool manufacture and use, but do not attend to barb direction during pandanus tool use. We conclude that task context, the time and energetic costs of attending to barbs, relative foraging efficiency, and different experimental designs may influence whether, and to what degree, NC crows attend to pandanus barbs.

Journal

BehaviourBrill

Published: Jan 1, 2015

Keywords: New Caledonian crow; tool manufacture; tool use; folk physics; tool selection task

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