KEY TO BIRDS' NESTS 



V. Containing Sticks or Large Twigs. 



A. Bulky nests in trees, 15 to 60 inches outside 

 diameter. 



1. Very large, 30 to 60 inches 



Fish Hawk and Bald Eagle 



2. Smaller, no lining, flat Herons 



3. Hollowed, lining of bark 



Crow and Owl 

 Great-horned 



Long-eared 



4. Hollowed, lining of fresh leaves 



or evei'greens 



Hawks 



Red-shouldered 



Red-tailed 



Cooper's 



Sharp-shinned 



5. Spherical nests Squirrels 



AA. Smaller nests, less than 15 inches outside. 

 B. Cup-like chimneys, hollow trees, or 



silos Chimney Swift 



BB. Otherwise. 



C. Platform, very shallow. 



1. No lining Mourning Dove 



2. A little lining Cuckoos 



CC. Deeply hollowed, 1 to 3 inches deep. 



D. In thickets or scrubby trees, under 

 3}i inches inside diameter. 



1. Lining of leaves and rootlets. 



Catbird and Brown Thrasher 



2. Lining of bark and wool . . . 



Migrant Shrike 

 DD. In trees usually evergreen, over 

 3}^ inches inside diameter. . . 



Blue Jay 



VI. Felted Nest of Cottony Materials : 



A. Nests wider than high, containing 



thistledown Goldfinch 



AA. Nests higher than wide, no thistledown. 

 B. Thick walled, usually in vertical 



fork of bush or tree. .Yellow Warbler 



19 



