^ 



Fig. 8. Kooky Mountain White-tailed 

 Ptarmigan in winter plumage, on snow, and 

 faTorably lighted for inconspicuousness. 

 Rotundity as dimly apparent as is possible 

 without counter-shading. 



Photographed from life by Edward R. Warren. 



Fig. 9 Eocky Mountain White-tailed Ptarmigan, in winter plu- 

 mage, off snow. Their rotundity, revealed by their lack of counter- 

 shading, 13 marked. But they may still pass for lumps of snow. 

 Photographed from life hy E. R. Warren. 



unfa^/o^ra^ryli^Sff^l-i^Xi^t'et^* '''^™'^^" ^ -'"'" >"-='S^. - -»-. ^--t 



Photographed from life by E. R. Warren. 



