. The Auk. Birds. Stomach Lining of Ducks. 1-4 Mallard, 5 and 7 Black Duck, G Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Ornithologists' Union. Washington, D. C. : American Ornithologists' Union, etc.

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Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1884