NORTH AMERICAN GULLS AND THEIR ALLIES. 
GLAUCOUS-WINGED GULL. Larus glaucescens Naumann. 
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Range. — Coasts 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 
• BREEDING 
O OCCURRENCE IN SUMMER 
+ WINTERING 
■<>■ OCCURRENCE IN WINTER 
-f RESIDENT 
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 
