ROCK PTARMIGAN. 



Lagopus rupestris. 

 Lagopus rupestris reinhardi. 

 Lagopus rupestris welchi. 

 Lagopus rupestris nelsoni. 

 Lagopus rupestris atkensis. 

 Lagopus rupestris townsendi. 

 Lagopus rupestris evermanni. 

 Lagopus rupestris chamberlaini. 

 Lagopus rupestris kellogce. 

 Lagopus rupestris dixoni. 



The bill of the rock ptarmigan is much more slender 

 than that of the willow ptarmigan, and the bird is 

 somewhat smaller, measuring from 13 to 14^ inches. 

 In winter the bird is white, with black tail ; but a line 

 running from the eye to the bill is also black. It is 

 said that the female does not always have this black 

 spot covering the lores. 



In summer the male is grayish brown, the feathers 

 being crossed with fine black lines, which tend to form 

 irregular zigzag bars. The shoulder feathers, or scapu- 

 lars, are chiefly black, which gives the effect of 

 large black spots on the back. The quills of the wing 

 primaries and secondaries- and the outer tertiaries 



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