60 EGGS OF NORTH AMERICAN BIRDS. 



347. Rough-legged Hawk, Archibuteo lagopus. Eggs, 4 

 to 6, varying from spherical to oval, ashy or yellowish whiti.', 

 spotted and blotched irregularly and rather finely and faintly 

 with reddish brown and umber, with frequent markings of 

 purplish; 1.75 + 2.12 to 1.82 -|- 2.26. Extralimital. Breeds 

 in the northern parts of the Old World. Bird accidental in 

 Alaska. 



347a. American Rough-legged Hawk, Archibuteo lago- 

 pus smicti-joJiannis. Eggs, indistinguishable from those of 

 No. 347, both in form and color. Breeds in North America, 

 north of the United States, in May and June. Nests placed 

 on trees or occasionally on cliffs. 



348. Ferruginous Rough-leg, Archibuteo ferrugineiis. 

 Eggs, 2 to 5, rather spherical, varying from white to creamy, 

 spotted and blotched with brown and umber of varying 

 shades; 1.95 + 2.43 to 2.00 + 2.60. Breeds in Western 

 North America, generally in May and June. Nests placed in 

 trees, as a rule, but occasionally on the ground. 



349. Golden Eagle, Aquila chrysaetos. Eggs, 2 or 3, 

 rarely 4, varying from elliptical to spherical, dirty white or 

 creamy, usually spotted and dotted with pale reddish brown, 

 but occasionally unmarked ; 2.18 -|- 2.65 to 2.52 -|- 3.30. 

 Breeds throughout the mountainous regions of North America, 

 south to Mexico. Nests, as a rule, placed on cliffs, rarely ou 

 trees, and more rarely on the ground. 



350. Harpy Eagle, Thrasaetus harpyia. Eggs, unknown 

 to me. Extralimital. Occurs in South America, south to 

 Paraguay. Bird casual in the lower Rio Grande Valley, 

 Texas. 



351. Gray Sea Eagle, Ilaliceetus alhicilla. Eggs, 2 or 3, 

 rather spherical, white, usually unspotted, but occasionally 

 showing faint marks of light brown ; 2.25 -|- 3.00 to 2.30 

 -\- 3.10. Nests placed on cliffs. Extralimital. Breeds in 

 Northern Europe and Asia ; bird occasional in Southeastera 

 Greenland. 



