434 The Wilson Bulletin — No. 93 



A Cowbird came into the nest tree while the female was 

 in the nest, sneaked to the nest opening and looked in. What 

 she saw was evidently not reassuring as she quickly backed 

 away and flew off. 



A squirrel crossing the glade was vigorously attacked and 

 made to scamper for refuge to the nearest tree. Once safely 

 there he turned and expressed his opinion of the Great Crest 

 in shrill and violent language. 



The most vicious performance which I witnessed was an 

 attack on an immature Bronzed Crackle. He blundered into 

 the nest tree while the male was sitting on one of the topmost 

 branches, and had hardly settled himself when he was struck 

 a violent blow from behind and sent sprawling to the ground. 

 He lay there squawking for a few moments and then started 

 to fly away. Hardly had he lifted himself from the ground 

 when another blow on the back of the head caused him to 

 turn a complete somersault into a small bush. He crawled 

 out on the side opposite the nest and flew away without being 

 further molested. The Creat Crest used both beak and 

 wings in the attack and the second blow took several feath- 

 ers out of the grackle's head. 



A TWO-YEAR NESTING RECORD IN LAKE 

 COUNTY, ILL. 



BY COLIN CAMPBELL SANBORN AND WALTER A. GOELITZ. 



(Photographs by Walter A. Goelitz.) 



Lake County lies on Lake Michigan in the north-east cor- 

 ner of Illinois. That part of Lake County in which the fol- 

 lowing records were made, extends along Lake Michigan 

 from the Illinois-Winconsin state line at the north, to the 

 Cook County line on the south, and west about ten miles to 

 the Des Plaines River, and in the northern portion, farther 

 west to the McHenry County line. This territory may be 

 divided into five separate tracts: (1), the sand dunes and 

 marshes of Beach in the the north-east confer; (2), the bluffs 



