mann] BIRD-STUDY IN NORTHERN ILLINOIS 199 



cared for the parents protest in chorus if an intruder enters their 

 domain. 



Upper — Grackle feeding young a white grub. 



Lower — After feeding young. 



Copyrighted 1913 by R. E. Wager 



Each season the Nature-Study classes select some conveniently 

 placed nest for all-day observation. Going at early morning, as 

 soon as it is light enough to see objects, the observer for that 



