Jan., 1909. Birds of Illinois and Wisconsin — -Cory. 721 



PART 4. EGGS 1.25 TO 1.75 IN. LONG. 



Eggs, 4 to 6. Size, about 1.45 x 1.20. Bird, gray, sometimes red- 

 brown. Otus asio. 



Screech Owl. 



PART 5. EGGS OVER 1.75 IN. LONG. 



Eggs, 8 to 14. Size, about 2.05 x 1.55. Eggs, buff white, or pale 

 buff, not pure white. Aix sponsa. 



Wood Duck. 

 Eggs, 2 to 4. Size, about 1.95 x 1.65. Eggs, white. 



Strix varia. 

 Barred Owl. 

 Eggs, 8 to 10. Size, about 2.10x1.75. 



Lophodytes cucullatus. 

 Hooded Merganser. 

 Eggs, 2 to 3. Size, about 2.20 x 1.82 Eggs, pure white. 



Bubo virginianus. 

 Great Horned Owl. 



SECTION 3. NEST ABOUT DWELLINGS AND BARNS. 



Eggs, 4 to 6. Size, about .78 x .58. Nest, moss, grass, and mud 

 placed on top of beam or rafter, not attached to side. Sayornis phcebe. 



Phcebe Flycatcher. 



Eggs, 4 to 6. Size, about .80 x .52. Shape, narrower than preceding 



species. Nest usually in chimney (sometimes in bams), composed of 



small dead twigs glued to side of bricks or rafter. Bird, smoky black. 



ChcBtura pelagica. 



Chimney Swift. 



Eggs, 4 to 5. Size, about i.oo x .70. Distinguished by size from 



others in this section. Progne subis. 



Purple Martin. 



SECTION 4. NEST IN OPEN FIELDS, ON GROUND OR 

 IN BUNCH OF GRASS. 



PART I. EGGS LESS THAN 1.50 IN. LONG. 



Eggs, 2. Size, about i.iox.82. Nest, a fiat mat of twigs, rarely 

 on the ground, usually on a branch. Zenaidura macroura carolinensis. 



Mourning Dove. 



Eggs, 10 to 18. Size, about i . 20 x .94. Nest, merely a little grass 



on ground. Colinus virginianus. 



Quail. Bob-white. 



