474 Field Muskum ok Natuual History Zoology, Vol. IX. 



tree, but more coininonl)' on a rocky clilY. Tlu- t'^^s arc from two 

 to four, dull white or washed and marked with brown. They meas- 

 ure about ,^ X 2.^q inches. 



Genus HALIy^'.ETUS Savigny. 



166. Haliaeetus leucocephalus (Linn.). 

 Bald Eagle. 



Distr.: North America from northern Mexico to British Columbia 

 and Ungav^a (a subspecies occurs in Alaska), breeding throughout its 

 range. 



Adult: Tarsus, not entirely feathered as in the Golden Eagle; 

 head, neck and tail, white; general plumage, dark brown; primaries, 







1-4^^ vi- ^"^ " 









Bald Eagle. 



black or blackish; bill and feet, yellow; iris, yellow. The sexes are 

 similar but the female is larger than the male. The adult does not 

 assume the perfect white head and tail until the third year. 



Immature (first year) : Very dark brown, the bases of the feathers, 

 white, and showing mor£ or less in the plumage; bill, black; iris, 

 brown; feet, yellowish. 



