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By: Young, Kendal E., - Thompson, Bruce Carlyle, - Terrazas, Alberto Lafón - Montoya, A B - Valdez, RaulType: ArticleIn: The journal of raptor researchVolume: 38Series:Issue: 2Date: 2004Page Range: 107--117Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: