NORTH AMERICAN GULLS AND THEIR ALLIES. 27 



GLAUCOUS-WINGED GULL,. Lams glaucescens Naumann. 



Bange.—€oaste of the North Pacific, Bering Sea, and the adjacent 

 Arctic Ocean, south to Lower California and Japan. 



Breeding range. — The center of abundance of the glaucous-winged 



Fig. 10.— Glaucous-winged gull (Larus glaucescens). 



gull during the breeding season is the Aleutian Islands, where it is 

 the most abundant of gulls nesting throughout the whole chain, 

 including the Near Islands (Turner) and the Pribilofs (Lucas). It 

 nests also on the Commander Islands (Stejneger) and north to St. 

 Michael and Cape Denbigh (McGregor). A single bird was seen at 



