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By: Milensky, Christopher M - Claramunt, Santiago - Schmidt, Brian K. - Gebhard, Christina A - Schmitt, C. Gregory - Erskine, Kristine TType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 127Series:Issue:Date: 2007Page Range: 118--128Publication Info: London, British Ornithologists' Club, 1893-Subjects: