U. S. NATIONAL MUSEUM 



BULLETIN 162 PLATE 38 



Partially Concealed Nest of Willow ptarmigan 

 St. Michael, Alaska, June 8, 1914. 







•A«! ' * 



Open Nest of Willow ptarmigan 

 Yukon Delta, Alaska, June 1 1, l'.'i t. Both photographed bj !■'. Sej mour Bersey for the author. 



