UNITED STATES DEPARTMENT OF AGRICULTURE 



DEPARTMENT BULLETIN No. 1165 



Washington D. C 



July 20, 1923 



REPORT ON BIRD CENSUSES !N THE UNITED STATES 

 1916 TO 1920 



By 



MAT THACHER COOKE, Assistant in Biological Investigations 

 Bureau of Biological Survey 



CONTENTS 



Introduction 1 



Methods tf talon; bird ceesnses 3 



EsseiUals of a satisfactory censes 4 



More reports needed on certain areas i 



Retails of bird censuses aorta e Maryland and east of 



the Plains 6 



Results of censuses fro-n soot beast era States ... 9 



Remltt si censuses from westers States . . ... 20 



Page 



Some notable bird-:enso5 results ......... 15 



Relative abundance of certain species 21 



Density of bird population 23 



Bird lifs of marshland 24 



Bird life of the woodland 27 



Surely of birds in 1918 28 



Birds respond to prolectioi 31 



Summary 33 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



1923 



