Journal
BIOLOGY LETTERS
Volume 7, Issue 6, Pages 825-828Publisher
ROYAL SOC
DOI: 10.1098/rsbl.2011.0388
Keywords
birds; tool use; physical cognition
Categories
Funding
- Austrian Science Fund FWF [P19087-B17]
- ERC [230604 SOMACCA]
- Austrian Science Fund (FWF) [P19087] Funding Source: Austrian Science Fund (FWF)
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This study depicts how captive kea, New Zealand parrots, which are not known to use tools in the wild, employ a stick-tool to retrieve a food reward after receiving demonstration trials. Four out of six animals succeeded in doing so despite physical (beak curvature) and ecological (no stick-like materials used during nest construction) constraints when handling elongated objects. We further demonstrate that the same animals can thereafter direct the functional end of a stick-tool into a desired direction, aiming at a positive option while avoiding a negative one.
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