DISTRIBUTION. 



17 



duck (ffistrionicus histrionicus), American eider (Somateria dresseri), 

 and white- winged scoter ( Oidemiadeglandi). But the individuals which 

 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 entirely 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, Aylhya marila (rare in the north- 

 ern United States). 



American golden-eye, Clangula clangula 

 americana (rare in the northern United 

 States). 



Barrow golden-eye, Clangula islandica 

 (rare in the Rocky Mountains of the 

 United States). 



Buffle-head, ChariloneUa albeola (rare in 

 the northern United States). 



Old-squaw, Harelda hyemalis. 



Harlequin duck, ffistrionicus 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, Chen hyperborea 



nivalis. 

 Blue goose, Chen cserulescens. 

 Ross goose, Chen rossii. 

 White-fronted goose, Anser albifrons gam- 



beli. 

 Hutchins goose, Branla canadensis hulch- 



insii. 

 Cackling goose, Branta canadensis minima. 

 White-bellied brant, Branta bernicla 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 of the Arctic Circle, with the Northern- 

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

 Hemisphere. 



Old-squaw, Harelda hyemalis, 82°. 



Steiler eider, Poiysticta stelleri, 71°. 



Spectacled eider, Arclonetta fischeri, 71° 



Northern eider, Somateria molhssima bore- 

 alis, 82°. 



Pacific eider, Somateria v-nigra, 76°. 



King eider, Somateria speclabilis, 82°. 



Lesser snow goose; Chen hyperborea, 74°. 



Greater snow goose, Chen hyperborea ni- 

 valis, 72° (accidental at 82°). 



Ross snow goose, Chen rossii, 68°. 



American white-fronted goose, Anser albi- 

 frons gambeli, 71°. 



Hutchins goose, Branta canadensis hutch- 

 insii, 70° 



Cackling goose, Branta canadensis min- 

 ima, 71°. 



White- bellied brant, Branta bernicla glau- 

 cogastra, 82°. 



Black brant, Branta nigricans, 76°. 



Whistling swan, Olor columbianus, 74°. 



Southern Species, with Northern Limit of Breeding Range. 

 Anas fulvigula (northern 



Florida duck 

 Florida). 



Mottied duck, Anas fulvigula maculosa 

 (northern Texas; accidental in Kansas). 



Masked duck, Nomonyx domtnicus (south- 

 ern Texas). 



Black-bellied tree-duck, Dendrocygna au- 



tumnalis (southern Texas). 

 Fulvous tree-duck, Dendrocygna fulva 



(central California). 



