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By: Jenkins, M A - Sherrod, S K - Wiedenfeld, David A. - Wolfe, Donald H. (Donald Howard),Type: ArticleIn: The journal of raptor researchVolume: 36Series:Issue: 4Date: 2002Page Range: 324--327Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Wiedenfeld, David A.Type: ArticleIn: Bulletin of the British Ornithologists' ClubVolume: 105Series:Issue:Date: 1985Page Range: 113--116Publication Info: London, British Ornithologists' Club, 1893-Subjects: