294 COLYMBIDiE. 



Order COLYMBIFORMES. 



Family COLYMBID^. 

 Genus COLYMBUS LinncBus, Syst. Nat. 1758, p. 135. 

 Type : C. arcticus Linn. 



Colynibus = KoXvfijSo?, a diver j KoXv/ijiau) = I dive. 



Colymbus arcticus. Black-theoated Diver. 



Colymbus arcticus Linnceus, Syst. Nat. 1758, p. 135 : 



Sweden. 



Colymbus arcticus Linn. ; B. O. JJ. List, 1st ed. 1883, p. 201 ; 

 Ogilvie-Grant, Cat. Birds B.M. xxvi. 1898, p. 492 ; Saun- 

 ders, Manual, 2nd ed. 1899, p. 713. 



Arcticus = apKTiKos, northern : from apicTos = the constellation of the 

 Bear. 



Distribution in the British Islands. — A Besident, breeding 

 in Scotland from Perthshire and Argyllshire northwards, 

 being most numerous in the northern counties, where suitable 

 nesting-sites on the lochs are abnndant. It also breeds in 

 the Outer Hebrides, and occasionally in Skye and the Ork- 

 ney and Shetland Islands. As a Winter Visitor it is 

 uncommon about our coasts, especially in the west of Great 

 Britain and round Ireland. 



General Distribution. — The Black- throated Diver breeds in 

 the northern portions of Europe and Siberia, ranging west- 

 wards to Iceland and the Faeroe Islands and eastwards to 

 Japan. In winter it visits the Mediterranean, Black, and 

 Caspian seas. In western North America it is represented 

 by the closely allied C. a. pacificus, which ranges south in 

 winter to California. 



