Manufacture and use of hook-tools by New Caledonian crows
@article{Hunt1996ManufactureAU, title={Manufacture and use of hook-tools by New Caledonian crows}, author={Gavin R. Hunt}, journal={Nature}, year={1996}, volume={379}, pages={249-251} }
TOOL behaviour in wild birds has been described as mostly stereotyped1,2, and tool manufacture involves little modification of material3–5. Here I report in New Caledonian crows Corvus moneduloides the manufacture and use of two different types of hook tool to aid prey capture: hooked-twig and stepped-cut barbed pandanus leaf. Crow tool manufacture had three features new to tool use in free-living nonhumans: a high degree of standardization, distinctly discrete tool types with definite…
501 Citations
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References
SHOWING 1-10 OF 10 REFERENCES
Tool-Making and Tool-Using in the Northern Blue Jay
- BiologyScience
- 1973
Laboratory-raised Northeirn blue jays (Cyanocitta cristata) have been observed tearing pieces from pages of newspaper and utilizing them as tools to rake in food pellets which were otherwise out of…
Object manipulation, tool use and sensorimotor intelligence as feeding adaptations in cebus monkeys and great apes
- Psychology, Computer Science
- 1977
A middle stone age worked bone industry from Katanda, Upper Semliki Valley, Zaire.
- HistoryScience
- 1995
Three archaeological sites at Katanda on the Upper Semliki River in the Western Rift Valley of Zaire have provided evidence for a well-developed bone industry in a Middle Stone Age context, indicating that a complex subsistence specialization had developed in Africa by this time.
Shell Dropping: Decision-Making and Optimal Foraging in Northwestern Crows
- Biology
- 1979
Decision-making and optimal foraging was investigated in Northwestern crows feeding on whelks (Corvus caurinus) and foraging efficiency was close to the maximum value attainable for crows.
Classification and human evolution
- Biology
- 1963
A comparison of the Ecology and Behavior of Monkeys and Apes and the Taxonomic Evaluation of Fossil Hominids shows that monkeys and apes have more in common with each other than with other primates.
The Human Revolution
- HistoryCurrent Anthropology
- 1992
THE HUMAN REVOLUTION* By CHARLES F. HOCKETT and ROBERT ASCHER This essay attempts to set forth the story of the emergence of the first humans from their prehuman ancestors. A special feature is that…
Spontaneous tool use and sensorimotor intelligence in Cebus compared with other monkeys and apes
- Psychology, BiologyBehavioral and Brain Sciences
- 1989
Spontaneous tool use and sensorimotor intelligence in Cebus were observed to determine whether tool use is discovered fortuitously and learned by trial-and-error or, rather, whether advanced sensorsimotor abilities are critical in its ontogeny and evolution.
Chimpanzee Material Culture: Implications for Human Evolution
- Biology, Psychology
- 1992
This paper presents a meta-analyses of chimpanzees as models for ethnology and shows clear patterns of culture in what chimpanzees are, are not, and might be compared to other apes.