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By: Marki, Petter Z - Sam, Katerina - Koane, Bonny - Kristensen, Jan Bolding - Kennedy, Jonathan D - Jønsson, Knud AType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 136Series:Issue: 4Date: 2016Page Range: 263--271Publication Info: London, British Ornithologists' Club, 1893-Subjects: