Birds of Canada. 109 
L. canus.—The Common Gull. 
The Common Gull is the inost numerous of 
the family. It is seventeen inches long; bill, 
yellow ; head, neck, tail, and whole under side 
of the body, white ; the back and coverts of the 
wings are gray. 
L. glaucus —The Glaucous Gull. 
This gull breeds in the arctic regions. An 
accidental visitor in Canada. 
L. leucopteris—The White-winged Gull. 
This species breeds in the far north. A rare 
visitor. 
L. Delawarensts-——The Ring-billed Gull. 
This gull is a rare visitor in Canada. 
L. eburneus—TVhe Ivory Gull. 
This beautiful gull is very common in the 
arctic regions, and occasionally visits Canada 
in the fall and winter. 
Creagrus furcatus—The Swallow-tailed Gull. 
This pretty gull is an accidental visitor in 
Canada. Its habitat is the Pacific coast. 
Chrotcocephalus atricilla—The Laughing Gull. 
This little gull is a summer resident of 
Canada. The head and upper part of the neck 
