141 



|228a. Haliceetus alhicilla groenlandicus Brehm, 

 Handb. Naturg. Vog. Deutschl., p. 16 

 (1831). [Greenland.] 

 Greenland White-tailed Eagle. 



Greenland. 



Larger ; wing c? 615, ? ad. 720 mm. (juv. 

 685-710 mm.) (cf. Hartert, Vogel d. 

 palaarkt Fauna, p. 1178). 



1*229. Haliceetus leucocephalus leucocephalus 

 (Linn.), S.N., ed. xii., i., p. 124 (1766). [ex 

 Catesby — Carolina.] 

 Bald Eagle. 



Wing ad. 585-625 mm. ; head and neck 

 all round, rump, upper tail-coverts and tail 

 pure white. Immature : head and neck 

 black and tail mingled white and black at 

 first. 



Canada and 

 United States, 

 S. to Lower 

 CaUfornia and 

 N. Mexico. 



•|"229a. Haliceetus leucocephalus alascanus C. H. 

 Townsend, Proc. Biol. Soc. Wash., xi., p. 

 145 (1897). [Unalaska, type in U.S. Nat. 

 Mus.] 

 Alaskan Bald Eagle. 



Rather larger; wing ^ 625-635, $ 600- 

 642 mm. 



N.W. Alaska, 

 Bering I., 

 N.W. Mackenzie 

 and N. Ungava 

 S. to Brit. 

 Columbia and 

 Great Lakes. 



Gen. LXIV. THALASSOAETUS Kaup (1844). 

 Type by monotypy Aquila pelagica PaU. 



Tail strongly graduated, with 14 feathers, instead 

 of 12; bill larger and more powerful, height 

 greater but variable. 



