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The sexual dimorphism of Snares Cape pigeons (Daption capense australe)

  • Publication Type

    Journal Article

  • Publication Year

    1986

  • Author(s)

    P.M. Sagar

  • Journal Name

    Notornis

  • Volume, Issue

    33, 4

  • Pagination

    259-263

  • Article Type

    Paper

  • DOI

    https://doi.org/10.63172/459938iirrox

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The sexual dimorphism of Snares Cape pigeons (Daption capense australe)

Notornis, 33 (4), 259-263

P.M. Sagar (1986)

Article Type: Paper

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The males of Snares Cape pigeons (Daption capense australe) breeding at the Snares Islands are larger than females, especially in head plus bill length, mid-toe plus claw, bill length, bill depth, tarsus, and weight. By using the measurements head plus bill length and mid-toe plus claw, one can reliably sex about 82% of the Snares Islands birds. The amount of sexual dimorphism is similar in both races of cape pigeon. The importance of having a wide range of calls during breeding is favoured as the reason for dimorphism having developed in fulmarine petrels.