RING-BILLED GULL 
54. Larus delawarensis. 18 in. 
Adults in summer.—White with pearl gray mantle; 
ends of outer primaries black with white tips; eye yel- 
low: feet and bill greenish-yellow, the latter crossed by 
a black band near the tip. In winter, the head and 
neck are streaked with grayish. Young birds are mot- 
tled brownish-gray above, and the tail has a band of 
blackish near the end. 
The adults can be distinguished from the Kittiwakes, 
which most closely resemble them, by the yellowish feet 
and white tips to the black primaries. 
Nest.—In hollows in the ground, usually in grass. 
The two or three eggs are gray or brownish gray, 
strongly marked with black (2.80x 1.75). They breed 
in large colonies, often in company with other gulls 
and terns. 
Range.—Whole or North America, breeding from New 
Foundland, Dakota and British Columbia northwards, 
most abundantly in the interior; winters from Northern 
United States southward. 
