U. S. NATIONAL MUSEUM 



BULLETIN 162 PLATE 41 



Male Willow Ptarmigan in Courtship Display 

 Savage River, Alaska, May 24, 1926 



Male Willow Ptarmigan in Nuptial Plumage 



Savage River, Alaska, May 25, 1926. Both photographs by Joseph Dixon; presented t>y courtesj of 

 the Museum of Vertebrate Zoology, Universit3 of < 'alifornia. 



