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By: Castellanos, Aradit - Jaramillo, F - Salinas, Federico - Ortegarubio, A - Arguelles, CType: ArticleIn: The journal of raptor researchVolume: 31Series:Issue: 1Date: 1997Page Range: 1--6Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: