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By: McClelland, B. Riley - Mcclelland, Patricia T - Yates, Richard E - Caton, Elaine L. - Mcfadzen, M EType: ArticleIn: The journal of raptor researchVolume: 30Series:Issue: 2Date: 1996Page Range: 79--89Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: