...In 1910, 1,200 ptarmigan from Norway, bound for the Chicago market,passed through the port of New York,—not by any means thefirst or the last shipment of the kind... 
William T. Hornaday 「Our Vanishing Wild Life」
...Behold how she hasresolutely locked the doors of her empty cage after all thesespecies have flown: Elk, antelope, wild turkey, passenger pigeon,whooping crane, sage grouse, ptarmigan and curlew...
William T. Hornaday 「Our Vanishing Wild Life」
...For example, there are long close seasons on antelope, elk(now extinct!), mountain sheep, bob white quail, pinnated grouse,wild pigeon and ptarmigan,—an admirable list, truly...
William T. Hornaday 「Our Vanishing Wild Life」
...The bag limit on grouse and ptarmigan of 20per day or 200 in a season is simply legalized slaughter, no moreand no less, and if it is continued, a grouseless province will bethe quick result...
William T. Hornaday 「Our Vanishing Wild Life」
...Rock Ptarmigan...
Chester A. Reed 「The Bird Book」
...This species, in summer, is more grayishthan the Rock Ptarmigan, and is very finelyvermiculated with blackish...
Chester A. Reed 「The Bird Book」
...The eggs do not differ in size or appearancefrom those of the Rock Ptarmigan...
Chester A. Reed 「The Bird Book」
..., Ptarmigan Hill, nearhead of Ashnola River, Cascade Range, British Columbia)...
E. Raymond Hall 「A Synopsis of the North American Lagomorpha」
...Characters the same as those of the Order; tarsus naked in Partridges andQuails; more or less feathered in Grouse and Ptarmigan...
Frank M. Chapman 「Color Key to North American Birds」
...Willow Ptarmigan (Lagopus lagopus)...
Frank M. Chapman 「Color Key to North American Birds」
...Reinhardt Ptarmigan (L...
Frank M. Chapman 「Color Key to North American Birds」
...Turner Ptarmigan (L...
Frank M. Chapman 「Color Key to North American Birds」
...Townsend Ptarmigan (L...
Frank M. Chapman 「Color Key to North American Birds」
...Evermann Ptarmigan (Lagopus evermanni)...
Frank M. Chapman 「Color Key to North American Birds」
...? White-tailed Ptarmigan (Lagopus leucurus)...
Frank M. Chapman 「Color Key to North American Birds」
...? Kenai White-tailed Ptarmigan (L...
Frank M. Chapman 「Color Key to North American Birds」
...The Ptarmigan is neither so abundant nor so generally diffusedin Scotland as the Grouse...
Rev. C. A. Johns 「British Birds in their Haunts」
...The ptarmigan, of course, are grouse...
Harry Thom Payne 「Game Birds and Game Fishes of the Pacific Coast」
...Bothfoxes and stoats are carnivorous and feed upon ptarmigan and hares, andthey must be protectively coloured that they may catch their prey...
Royal Dixon 「The Human Side of Animals」
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