| 单词 | rock ptarmigan | 
| 释义 | > as lemmasrock ptarmigan   rock ptarmigan  n. (originally) a ptarmigan of the main North American subspecies  Lagopus mutus rupestris, formerly thought to be a distinct species,  L. rupestris; (in later use) the common ptarmigan,  L. mutus; cf. rock grouse n., rock partridge n.Now used as the standard name for  L. mutus in international listings. ΚΠ 1819    J. F. Stephens Shaw's Gen. Zool. XI.  ii. 290  				Rock Ptarmigan. (Lagopus rupestris.). 1872    E. Coues Key to N. Amer. Birds 235  				Rock Ptarmigan. Tail black,..with a black transocular stripe. 1937    Auk 54 22  				The Rock Ptarmigan is a common breeding bird on all the islands of the Button group. 2003    Birder's World Apr. 31  				The tundra is also home to such cold-weather birds as the Gyrfalcon.., Snowy Owl, Rock and Willow Ptarmigan, and..Snow and McKay's Buntings. < as lemmas  | 
	
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