THE 



EGGS OF NORTH AMERICAN BIRDS. 



ORDER L — PYGOPODES. Diving Birds. 



Eggs, extremely variable in form and color, either plain or 

 spotted. Nesting habits, dissimilar. 



Family I. — PODICIPIDyE. Grebes. 



Eggs, oval, bluish green, covered with a chalky incrustation, 

 which in the freshly deposited egg is white, but quickly be- 

 comes stained. 



Nests, composed of a mass of weeds, grasses, etc., placed in 

 the water. 



1. Western Grebe, ^ch'>no2)horus occidentalis. Eggs, 

 3, 4, or 5; 2.25 + 1.50 to 2.35 -f 1.55. The largest of the 

 Grebes. Breeds throughout Western America, eastward to 

 Manitoba, in early June. 



2. Holbcell's Grebe, Colymhus holboellii. Eggs, 8 to 10 ; 

 1.35 -f- 2.00 to 1.40 + 2.10. Breeds throughout extreme 

 Northern North America and Greenland, late in June. 



3. Horned Grebe, Colymbus anritus. Eggs, 4 to 6 ; 1.15 

 + 1.70 to 1.20 -f- 1.75. Smaller in size than those of No. 6. 

 Breeds throughout North America from Northern United 

 States, northward, late in June. 



4. American Eared Grebe, Colymhus nigricollis californi- 

 cus. Eggs, 4 to 6; 1.70 -\- 1.80 to 1.18 + 1.33. Breeds 

 throughout Northern and Western North America west of the 

 Mississippi Valley, late in June. 



5. St. Domingo Grebe, Colymbus dom,inicus. Eggs, un- 

 known, but they must be the smallest of all Grebes' eggs. 



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