U. S^ NATIONAL MUSEUM 



BULLETIN 176 PLATE 43 



Sequoia National Parle, Calif., August 7, 1V3 



J. S. Dixon. 

 Courtesy of National Park Service. 



Yosemite, Calif., August 22, 1926. 



Five weeks old. 

 Young Northern Black swifts. 



C. VV. Michael. 



