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By: Greeney, Harold F - Juiña, Mery - Harris, J Berton C - Wickens, Michael T - Winger, Ben - Gelis, Rudolphe A - Miller, Eliot T - Solano-Ugalde, AlejandroType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 130Series:Issue:Date: 2010Page Range: 61--68Publication Info: London, British Ornithologists' Club, 1893-Subjects: