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A new tool-using bird to crow about.

Natalie Uomini1, Gavin Hunt2

  • 1Max Planck Institute for the Science of Human History, Kahlaische Strasse 10, 07745, Jena, Germany. traduck@gmail.com.

Learning & Behavior
|April 2, 2017
PubMed
Summary

Hawaiian crows, an endangered species, demonstrate sophisticated tool use, mirroring behaviors seen in New Caledonian crows. This discovery offers insights into avian intelligence and the evolution of tool-making skills in birds.

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Area of Science:

  • Ornithology
  • Animal Behavior
  • Cognitive Evolution

Background:

  • The Hawaiian crow (Corvus hawaiiensis), critically endangered, faces extinction in the wild.
  • Tool use is a complex cognitive ability observed in a limited number of animal species.
  • Previous research has highlighted the New Caledonian crow (Corvus moneduloides) as a prominent example of avian tool use.

Purpose of the Study:

  • To investigate the tool-using capabilities of the endangered Hawaiian crow.
  • To compare the tool-using behavior of Hawaiian crows with that of New Caledonian crows.
  • To explore the evolutionary implications of tool use and intelligence in avian species.

Main Methods:

  • Cognitive tests were administered to the last surviving captive members of the Hawaiian crow species.
Keywords:
Comparative cognitionCorvidTool use

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  • Behavioral observations focused on problem-solving tasks requiring tool manipulation.
  • Comparative analysis was conducted with established data on New Caledonian crow tool use.

    • Main Results:

    • Hawaiian crows exhibited significant skill in using and modifying tools to achieve specific goals.
    • The observed tool-using behaviors were remarkably similar to those documented in New Caledonian crows.
    • The findings confirm the Hawaiian crow as a proficient tool user, despite its endangered status.

    Conclusions:

    • The Hawaiian crow possesses advanced cognitive abilities related to tool use, comparable to other intelligent corvids.
    • This finding suggests that sophisticated tool use may have evolved independently or be conserved across different crow species.
    • The study underscores the importance of conservation efforts for endangered species that exhibit unique cognitive traits.