330 



KEY AND DESCRIPTION 



with pearl-gray, but there is a darker spot around the eye. 

 The young has the back of the neck and lesser wing coverts 

 black. The name is derived from the bird's cry, kitti-aa, kitti-aa. 



Length, 17 ; wing, 12;| ; tail, 4J ; tarsus, IJ ; oulmen, 1|. Arctic re- 

 gions, south in eastern America, in winter to the Great Lakes and the 

 Middle States. 



15. Glaucous Gull (42. Ld,rus glaiicus). - 

 ern, nearly white ■ gull, with yellow 



- A very large, north- 

 bill, a light pearl- 

 gray mantle, and 

 white tips ; no black _ 

 anywhere in any 

 plumage. Yo ung 

 much mottled ashy 

 and buffy. (Burgo- 

 master.) 



Length, 30 ; wing, 18 

 (16J-18f) ; tail, 8 ; tar- 

 sus, 2| ; culmen, 2^. 

 Arctic regions ; breed- 

 ing in America from 

 Labrador northward, 

 and south in winter to the Great Lakes and Long Island. 



Glattoous Gull 



16. Iceland Gull (43. Lclrus leucdpterus). — A large, north- 

 ern, almost white gull, much like the last in coloring, but in its 

 movements and feeding more like the herring gull (No. 19). 

 The mantle is pale pearl-gray, and there are no dark tips to 

 the primaries. 



Length, 25 ; wing, 15^^ (14|-16J) ; tail, 6| ; tarsus, 2J ; oulmen, IJ. 

 Arctic regions ; south in winter to the Great Lakes and Long Island, 

 sometimes still farther. 



17. Kumlien's Gull (45. Lh,rus kumlieni). — Similar to the 

 last two, but with the primaries distinctly marked with ashy- 

 gray. The iirst primary has -a white tip with ashy-gray outer 

 web ; the second, with only a part of the outer web ashy-gray ; 

 the third and fourth have little gray on the outer webs, but 

 some on both webs near the tips. 



