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SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 

 Bulletin 117 



THE DISTRIBUTION OF BIRD LIFE IN 



THE URUBAMBA VALLEY 



OF PERU 



A REPORT ON THE BIRDS COLLECTED BY THE 



YALE UNIVERSITY-NATIONAL GEOGRAPHIC 



SOCIETY'S EXPEDITIONS 



FRANK M. CHAPMAN 



Of the American Museum of Natural Htstety 



^ffm-mi^ 



WASHINGTON 



GOVERNMENT PRINTING OFFICl 



1921 



