DISTRIBUTION. 



17 



duck {Histrionic us histrionicus)^ American eider {Somateria dresser i)^ 

 and white-winged scoter ( Oidemia deglandi). But the individuals whieli 

 breed in the United States are so few — in the case of Somateria dresseri 

 less than a dozen pairs — that they may be ignored in this discussion. 

 Five other species of ducks breed entireh^ north of the United States, 

 making-, in all, 29 species that remain in summer north of our bounda- 

 ries, as follows: 



Species that Breed chiefly North of the United States. 



Red-breasted merganser, Merganser serra- 

 tor (rare in the northern United States). 



Red-legged duck, Anas obscura rubripes. 



Scaup, Aythya marila (rare in the north- 

 ern United States). 



American golden-eye, Clangula dangula 

 americana\rare in the northern United 

 States). 



Barrow g<:)lden-eye, Clangula islandica 

 (rare in the Rocky Mountains of the 

 United States). 



Buffle-head, Char'donetta albeola (rare in 

 the northern United States). 



Old-squaw, Ilarelda hyemaUs. 



Harlequin duck, Histrionicus histrionicus 

 (rare in the mountains of the north- 

 western United States). 



American eider, Somateria dresseri (rare 

 in Maine). 



King eider, Somateria speclabilis. 



American scoter, Oidemia americana. 



White- winged scoter, Oidemia deglandi 



(rare in North Dakota). 

 Surf scoter, Oidemia perspicillata. 

 Lesser snow goose, Chen hyperborea. 

 Greater snow goose, Clien hyperborea 



niralis. 

 Blue goose, Chen cierulescens. 

 Ross goose, Chen rossii. 

 •White-fronted goose, Anser albifrons gam- 



beli. 

 Hutchins goose, Branta canadensis hutch- 



insii. 

 Cackling goose, Branta canadensis minima. 

 White-bellied brant, Branta bernida glau- 



cogastra. 

 Black brant, Branta nigricans. 

 Whistling swan, Olor columbianus. 

 Trumpeter swan, Olor buccinator (for- 

 merly a few in the northern United 



States). 



Species that Breed chiefly North op the Arctic Circle, with the Northern- 

 most Latitude at which the Species has been observed in the Western 

 Hemisphere. 



American white-fronted goose, Anser albi- 

 Jrons gambeli, 71°. 



Hutchins goose, Branta canadensis hutch- 

 insii, 70°. 



Cackling goose, Branta canadensis min- 

 ima, 71°. 



White-bellied brant, Branta bernida glau- 

 cogastra, 82°. 



Black brant, Branta nigricans, 76°. 



Whistling swan, Olor columbianus, 74°. 



Old-squaw, Harelda hyemalis, 82°. 



Steiler eider, Pooysticta stelleri, 71°. 



Spectacled eider, Arctonetta fischeri, 71°. 



Northern eider, Somateria mollissima bore- 

 ali.% 82°. 



Pacific eider, Somateria v-nigra, 76°. 



King eider, Somateria spectatjdis, 82°. 



Lesser snow goose, Cheti, hyperborea, 74°. 



Greater sn<jw goose, Chen hyperborea ni- 

 valis, 72° (accidental at 82°). 



Ross snow goose, Chen rossii, 68°. 



Southern Species, with Northern Limit of Breeding Range. 



Black-bellied tree-duck, Dendrocygna an- 

 tumnnlis (southern Texas). 



Pulvous tree-duck, Dendrocygna Julva 

 (central California). 



Florida duck, Anas fulvigula (northern 

 Florida). 



Mottled duck. Anas fulvigula maculosa 

 (northernTexas; accidental in Kansas). 



Masked duck, Nomonyx dominicus (south- 

 ern Texas). 



