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By: Naka, Luciano Nicolas - Mazar Barnett, Juan - Kirwan, Guy M - Tobias, Joseph A. - Azevedo, Marcos A G DeType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 120Series:Issue:Date: 2000Page Range: 237--250Publication Info: London, British Ornithologists' Club, 1893-Subjects: