J^ 



^ 



Field Museum of Natural History. 



Publication 131, 



Zoological Series. 



Vol. IX. 



THE BIRDS OF ILLINOIS 

 AND WISCONSIN 



BY 



Charles B. Cory 



Curator of Department of Zoology. 



-^'f. ^^ (JZ^) 



Chicago, U. S. A. 

 1909 



