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By: Sidle, J G - Ball, Mark. - Byer, Timothy - Chynoweth, J J - Foli, Gary - Hodorff, R - Moravek, G - Peterson, Richard - Svingen, D NType: ArticleIn: The journal of raptor researchVolume: 35Series:Issue: 4Date: 2001Page Range: 316--321Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: