Issued Ma v 24, 1913. 



U. S. DEPARTMENT OF AGRICULTURE 



BIOLOGICAL SURVEY -BULLETIN No. 45 



HENRY W. HENSHAW, Chief 



DISTRIIjUTIQN_AND MIGRATION OF 



NORTH AMERICA^JIERONS 



AND THEIR ALLIES 





BY 



WELLS W. ('POKE 



Assistant , Biological Survey 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 

 1913 



