University of Wisconsin–Madisonimages.library.wisc.edu/EcoNatRes/EFacs/PassPigeon/ppv51...body...
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University of Wisconsin–Madisonimages.library.wisc.edu/EcoNatRes/EFacs/PassPigeon/ppv51...body weight (Chaplin 1974). Part of the need for this apparent surplus is in maintaining