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By: Harrington, B A - Leeuwenberg, F J - Resende, S Lara - Mcneil, R - Thomas, Betsy Trent - Grear, Jason S. - Martinez, E FType: ArticleIn: The Wilson bulletinVolume: 103Series:Issue: 4Date: 1991Page Range: 621--636Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects: