. Birds of America;. Birds -- North America. Photos by I. S. Howe. Courtesy of Nat. Asso. Aud. Soc. ROCK PTARMIGANS These pictures were taken Christmas Day on Turkey Creek, near Morrison, Colorado: they are a good illustration of the protective value of the dress of the Ptarmigans; the shadows on the snow can be seen at a greater distance than can the birds. 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 Pearson, T. Gilber
. Birds of America;. Birds -- North America. Photos by I. S. Howe. Courtesy of Nat. Asso. Aud. Soc. ROCK PTARMIGANS These pictures were taken Christmas Day on Turkey Creek, near Morrison, Colorado: they are a good illustration of the protective value of the dress of the Ptarmigans; the shadows on the snow can be seen at a greater distance than can the birds. 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 Pearson, T. Gilbert (Thomas Gilbert), 1873-1943. New York, The University Society
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Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidbirdsofameri, bookyear1923
