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. 



Phoebe Flycatcher. 



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

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

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



Chastura 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 flat 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. 



