Research output

Sex-biased mortality of common terns in wind farm collisions

Research output: Contribution to journalA1: Web of Science-article



Original languageEnglish
JournalThe Condor: an international journal of avian biology
Issue number1
Pages (from-to)154-157
Number of pages4
Publication statusPublished - 2008


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.
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