Sex-biased mortality of common terns in wind farm collisions

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    Abstract

    We studied sex differences in collision mortality in adult Common Terns (Sterna hirundo) at a wind farm in the direct vicinity of a breeding site in Zeebrugge, Belgium in 2005-2007. In total, 64 fatalities were collected and sexed, of which 64% were males. Uneven sex ratio among these birds was most pronounced during the period of incubation and early chick feeding (15 May-15 June), when 78% of the 28mortalities were male. During prelaying and feeding of young, the sex ratio of mortalities did not differ from equality. We argue that sex-biased collision mortality in Common Terns does not result from morphological differences between the sexes, but rather reflects differences in foraging frequency between males and females during egg-laying and incubation.
    Original languageEnglish
    JournalThe Condor: an international journal of avian biology
    Volume110
    Issue number1
    Pages (from-to)154-157
    Number of pages4
    DOIs
    Publication statusPublished - 2008

    Thematic list

    • Policy
    • Natura 2000 and conservation objectives
    • Conservation
    • Wind energy
    • Environment
    • Birds

    EWI Biomedical sciences

    • B280-animal-ecology

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