University of Wisconsin–Madisonimages.library.wisc.edu/EcoNatRes/EFacs/PassPigeon/ppv30... ·...
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University of Wisconsin–Madisonimages.library.wisc.edu/EcoNatRes/EFacs/PassPigeon/ppv30... · 2018-08-10 · Warblers abundant. Numbers of warblers were at times as high as in any