JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 723 



PART 3. EGGS MORE THAN 1.50 IN. LONG. 



Eggs, 5 to 8. Size, about 1.70 x 1.19; dull creamy white or buff y 

 white, more or less soiled. Nest, a mass of floating vegetation in swamp 

 or pond. Podilymbus podiceps. 



Pied-billed Grebe. 



Eggs, 3 to 6. Size, about 1.78 x 1.40; pure white. Nest on ground 

 in marshy places. Circus hudsonius. 



Marsh Hawk. 



Eggs, 6 to 12. Size, about 1.84x1.33; creamy white or buffy 

 white, not pure white. Nest on ground near water. 



Querquedula discors. 

 Blue-winged Teal. 



GROUP 2. EGGS BLUE OR GREENISH BLUE 

 (UNMARKED). 



SECTION i. NEST ON BRANCHES OF TREES OR 

 BUSHES. 



PART i. EGGS LESS THAN .76 IN. LONG. 



Eggs, 3 to 6. Size, about .66 x .47 ; faintly blue or bluish white. 

 Nest lined with thistle down, usually some distance from ground (6 to 

 25 ft.). Astragalinus tristis. 



American Goldfinch. 



Eggs, 3 to 4. Size, about .73 x .55; faintly blue, often apparently 

 white. Nest not lined with thistle down, usually in crotch of bush near 

 ground. Passerina cyanea. 



Indigo Bunting. 



PART 2. EGGS FROM .77 TO i IN. LONG. 



Eggs, 4 to 5. Size, about .80 x .60; very pale blue or bluish ashy. 

 Bird, shows more or less yellow on breast. Spiza americana. 



Dickcissel. Black-throated Bunting. 



E gg s 3 to 5- s * ze . about .93 x.68; deep blue or greenish blue. 

 Bird, general plumage slaty gray. Dumetella carolinensis. 



Catbird. 



PART 3. EGGS FROM i IN. TO 1.35 IN. LONG. ' 



Eggs, 2 to 5. Size, 1.02 x.74; light blue. Bird, above, rufous 

 brown ; under parts, white, with distinct spots. Hylocichla mustelina. 



Wood Thrush. 



Egg s > 3 to 5 Size, about i . 1 2 x .80 ; greenish blue, darker and larger 

 than Wood Thrush. Bird, breast and under parts, reddish brown. 



Planesticus migratorius. 

 Robin. 



