24 CHECK-LIST OF NORTH AMERICAN BIRDS. 



SUBORDER CEPPHI. LOONS AND AUKS. 



FAMILY GAVIIDJE. LOONS. 



GENUS GAVIA J. R. FORSTER. 



Gavia FORSTER, Enchirid. Hist. Nat., 1788, 38. Based exclusively upon 

 the Loons; type, by subs, desig., Colymbus imber GUNNERUS = C. 

 immer BRUNNICH (Allen, 1907). 



Gavia immer (BRUNNICH). Loon. [7.] 



Colymbus immer BRUNNICH, Orn. Borealis, 1764, 38. (Probably north- 

 ern Norway.) 



RANGE. Northern part of Northern Hemisphere. Breeds in 

 America from Kotzebue Sound, Banks Land, Barrow Strait, and 

 northern Greenland south to northern California, northern Iowa, 

 northern Illinois (at least formerly), northern Indiana, northern Ohio, 

 northern New York, Pennsylvania (casually), New Hampshire, Mass- 

 achusetts (rarely), and Nova Scotia; winters from southern British 

 Columbia, the Great Lakes, and southern New England to southern 

 Lower California, the Gulf coast, and Florida. 



Gavia adamsi (GRAY). Yellow-billed Loon. [8.] 



Colymbus adamsii GRAY, Proc. Zool. Soc. Lond., 1859, 167. (Alaska.) 



RANGE. Circumpolar. Breeds from northwestern Alaska, north- 

 ern Mackenzie, and Boothia Peninsula south to mouth of the Yukon 

 and to Great Slave Lake; south in migration to Nushagak, Alaska; 

 accidental in Colorado and Greenland; breeds also in northern Siberia 

 and on islands north of Europe. 



Gavia arctica (LiNN^us). Black-throated Loon. [9.] 



Colymbus arcticus LINN^US, Syst. Nat., ed. 10, I, 1758, 135. (Sweden.) 



RANGE. Northern part of Northern Hemisphere. Breeds from 

 Kotzebue Sound, Alaska, w r est along northern coast of Siberia, on is- 

 lands north of Europe, and from Cumberland Sound south to Ungava; 



