STATE OF ILLINOIS 
DEPARTMENT OF REGISTRATION AND EDUCATION 
DIVISION OF THE 
NATURAL HISTORY SURVEY 
STEPHEN A. FORBES, Chief 
Vol. XIV. BULLETIN Article X. 
; On the Numbers and Local Distribution 
E of Illinois Land Birds of the Open 
Country in Winter, Spring, 
' and Fall 
: 
: 
BY 
STEPHEN A. FORBES 
and 
ALFRED O. GROSS 
- PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS 
URBANA, ILLINOIS 
October, 1923 
