Strong between-site variation in New Caledonian crows' use of hook-tool-making materials.
Strong between-site variation in New Caledonian crows' use of hook-tool-making materials.
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DOI:
10.1111/bij.12757
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发表时间:
2016-06
期刊:
影响因子:
--
通讯作者:
Rutz C
中科院分区:
文献类型:
--
作者:
St Clair JJ;Klump BC;van der Wal JE;Sugasawa S;Rutz C
Functional tool use requires the selection of appropriate raw materials. New Caledonian crows Corvus moneduloides are known for their extraordinary tool‐making behaviour, including the crafting of hooked stick tools from branched vegetation. We describe a surprisingly strong between‐site difference in the plant materials used by wild crows to manufacture these tools: crows at one study site use branches of the non‐native shrub Desmanthus virgatus, whereas only approximately 7 km away, birds apparently ignore this material in favour of the terminal twigs of an as‐yet‐unidentified tree species. Although it is likely that differences in local plant communities drive this striking pattern, it remains to be determined how and why crows develop such strong site‐specific preferences for certain raw materials.
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DOI:
10.1098/rspb.2002.2302
发表时间:
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影响因子:
4.7
作者:
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通讯作者:
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影响因子:
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通讯作者:
Rutz C
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