288 



KEY AND DESCRIPTION 



name scarq) is derived from the sound of its notes. A very 

 common bay duck. (Greater Scaup Duck; Black-liead; Blue- 

 bill.) 



Length, 19 ; wing, 8f (8i-9) ; tail, 3 ; 

 tarsus, H; culmen, 2. North America; 

 breeding from Manitoba (rarely Minne- 

 sota) northward, and wintering from Long 

 Island to northern Soutli America. 



14. Lesser Scaup Duck (149. 

 Aj/thi/a qfftnin). — A duck smaller 

 than the last, but with nearly the 

 .same coloring, excepting that the re- 

 flections from the head of the male 

 arc purplish. The female can be 

 se})aratcd from the last only by the 

 difference in size. The habits of 

 the two species are much the same, 

 but this one is more frequently 

 found in the fresh waters of bays 

 and rivers. (Little Black-head.) 



Length, 10 ; wing, 7| (7J-8}) ; tail, 2J ; tarsus, If ; culmen. If North 

 America ; breeding mainly north of the United States, and wintering from 

 Virginia to Cuba. 



1/5. Ring-necked Duck (150. Aythya colliXris). — A small, 

 white-bellied, black duck, with an indistinctly outlined chest- 

 nut collar around the neck. The speculum is gray, and the 

 lower belly and sides have wavy cross lines of black. The 

 female is rusty-brown, with white belly and gray speculum. 

 The wing is less than 8 long. This is especiall}' a fresh-water 

 duck, probably more so than any other one of the genus. 



Length. 17; wing, 7i ; tail, 2f ; tarsus, IJ; culmen, IJ. North 

 America ; breeding in the interior from Iowa northward, and winter- 

 ing from the Middle States to Central America. Not common on the 

 Atlantic coast north of Virginia. 



16. American Golden-eye (151. Clamjula clangida ameri- 

 cd,na). — A brightly marked, dark-green (almost black) headed, 



Americau Scaup Dnck 



