list of two hundred of the more common birds of 

 Illinois. It is purely arbitrary in its nature and 

 represents a sort of compromise on the part of those 

 who were asked to state their opinion as to the two 

 hundred birds which are "more common" in Illinois. 

 This list is included in this booklet with the hope 

 that it will be of value for ready reference and that 

 the beginner may look upon it as a satisfactory 

 working list. 



The key to birds' nests which is also included in 

 this booklet is the work of Doctor Arthur A. Allen, 

 gf, SyraeuBC , New York, and has appeared in a recent 

 number of "Bird Lore." Doctor Allen has waived 

 the copyright privileges for its use in this Check 

 List, and the Illinois Audubon Society is greatly 

 indebted to him for this favor. The key should 

 prove to be of great service to observers in the field. 



The Illinois Audubon Society hopes that ob- 

 servers will find that the form in which this book- 

 let is issued lends itself to pocket use and the exi- 

 gencies of field work, and that the wide margins will 

 invite pencil notes made "on the spot." 



J. L. S. 



