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By: Baker, Aaron J - Whitacre, David F. (David Frederick) - Aguirre-Barrera, Oscar A. - López Ávila, Juventino. - White, Clayton M.Type: ArticleIn: The journal of raptor researchVolume: 33Series:Issue: 4Date: 1999Page Range: 343--344Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: