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By: Whitney, Bret M. - Pacheco, José Fernando - Paulo Sérgio Moreira Da Fonseca, Richard E Webster - Kirwan, Guy M - Mazar Barnett, JuanType: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 123Series:Issue:Date: 2003Page Range: 103--112Publication Info: London, British Ornithologists' Club, 1893-Subjects: