...Zebra, giraffe, elephant, and rhinoceros are most common; ptarmigan and guinea-fowl were also plentiful... 
Henry M. Stanley 「How I Found Livingstone」
...Fancy a city in the center of the United States sending to Norwayfor 1,500 ptarmigan, to eat, as Chicago did in 1911; and that wasonly one order...
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」
...Its eggs cannot be positively distinguishedfrom those of the Willow Ptarmigan...
Chester A. Reed 「The Bird Book」
...Its habits, nesting habits and eggs are just the same as those of 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」
...This species differs from any of the preceding in having at all seasons of theyear, a white tail; it is also somewhat smaller than the Rock Ptarmigan...
Chester A. Reed 「The Bird Book」
...Tetraonidae, Grouse, Capercailly, Ptarmigan, Prairie-Fowl,45 sp...
John Albert Leach 「An Australian Bird Book」
...Allen 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」
...Welch Ptarmigan (Lagopus welchi)...
Frank M. Chapman 「Color Key to North American Birds」
...? White-tailed Ptarmigan (Lagopus leucurus)...
Frank M. Chapman 「Color Key to North American Birds」
...Ungava Ptarmigan (L...
Frank M. Chapman 「Color Key to North American Birds」
...Dixon's Ptarmigan (L...
Frank M. Chapman 「Color Key to North American Birds」
...Adak Ptarmigan (L...
Frank M. Chapman 「Color Key to North American Birds」
...Whilst most birds shrink from cold, the Ptarmigan,on the contrary, seems to revel in it, and to fear nothing so muchas the beams of the sun...
Rev. C. A. Johns 「British Birds in their Haunts」
...Thecall of the old Ptarmigan is singularly loud and hoarse; it is a prolongedgrating, harsh note, and may be heard at a great distance...
Rev. C. A. Johns 「British Birds in their Haunts」
...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」
...The Ptarmigan is found inScotland and in the North of the continent of Europe; itchanges colour with the seasons, becoming snow-white in winter...
Various 「Natural History in Anecdote」
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