EGGS OF NORTH AMERICAN BIRDS. Ql 



352. Bald Eagle, Haliceetus lencocephalus. Eggs, 1, 2, or 

 3, rarely four, rather spherical, white, unspotted ; 2.25 -|- 2.75 

 to 2.75 -\- 3.00. Breeds throughout North America, south to 

 Mexico ; in Florida in December and January, in Mississippi 

 in January, in Maryland in February, in Maine in March, and 

 farther north, later. Nests usually placed in trees, but some- 

 times on cliffs. 



353. White Gyrfalcox, Fctlco islandus. Eggs, 3 or 4, 

 rather spherical, yellowish white, finely, but so thickly spotted 

 as to nearly obscure the ground color, with reddish brown ; 

 1.70 -1- 2.37 to 1.75 -|- 2.45. Breeds in the Arctic regions, 

 including Arctic America and Greenland, in May. Nests 

 placed in trees or on cliffs. 



354. Gray Gyrfalcon, Falco rusticolus. Eggs, indistin- 

 guishable from those of No. 353, and nesting habits are 

 similar. Breeds in Iceland, Southern Greenland, and North- 

 eastern North America. Nests usually placed on cliffs. 



354a. Gyrfalcon, Falco rusticolus gyrfalco. Eggs, indis- 

 tinguishable from those of No. 353, and the nesting habits 

 are similar. Breeds in the interior of Arctic America, from 

 Hudson's Bay to Alaska. 



354('>. Black Gyrfalcon, Falco rusticolus ohsoletiis. Eggs, 

 indistinguishable from those of No. 353. Breeds in Labrador, 

 in May. Nests placed on cliffs. 



355. Prairie Falcon, Falco mexicanus. Eggs, 2 or 3, 

 rather spherical, pinkish white, blotched, spotted, and minutely 

 freckled with reddish brown and purplish ; 1.60 -]- 2.15 to 1.65 

 -f- 2.27. Breeds in the United States, from the eastern border 

 of the plains to the Pacific, south into Mexico, in May and 

 June. Nests placed on cliffs. 



356. Duck Hawk, Falco peregrinus anatum. (Type, Plate 

 IX.) Eggs, 3 or 4, rounded oval, deep creamy, spotted and 

 blotched with such large, confluent markings of rich choco- 

 late brown that the ground color is nearly or quite obscured. 

 Breeds throughout North America, in the wild mountainous 



