U. S. DEPARTMENT OF AGRICULTURE 



BIOLOGICAL SURVEY— BULLETIN No. 26 



C. HART MERRIAM, Chief 



DISTRIBUTION AND MIGRATION OF NORTH 

 AMERICAN DUCKS, GEESE, 



AND SWANS 



BY 



^\^E;LLS ^W. COOKE 



Assistant, Biological Survey 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 

 19 



