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By: Jensen, W J - Gregory, Mark S. - Baldassarre, Guy A - Vilella, Francisco J. - Bildstein, Keith L. (Keith Louis),Type: ArticleIn: The journal of raptor researchVolume: 39Series:Issue: 4Date: 2005Page Range: 417--428Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects: