. Bulletin - United States National Museum. Science. ^S3 Male Willow Ptarmigan in Courtship Display Savage River, Alaska, May 24,1926. Male Willow Ptarmigan in Nuptial Plumage Savage River, Alaska, May 25, 1926. Both photographs by Joseph Dixon; presented t>y courtesj of the Museum of Vertebrate Zoology, Universit3 of < ' 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 United States National Museum; Smithso

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. Bulletin - United States National Museum. Science. ^S3 Male Willow Ptarmigan in Courtship Display Savage River, Alaska, May 24,1926. Male Willow Ptarmigan in Nuptial Plumage Savage River, Alaska, May 25, 1926. Both photographs by Joseph Dixon; presented t>y courtesj of the Museum of Vertebrate Zoology, Universit3 of < ' 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.

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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience