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Data for:
San Mateo, California, United States
List:

Charadriiformes > Laridae

Ring-billed Gull

Larus delawarensis

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Identification

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Widespread and common inland gull in the U.S. and Canada. Forages along lakes, rivers, and ponds, as well as, plowed fields, mall parking lots, and parks. Often in flocks sitting on ground or flying between roosting and foraging sites. Smaller and more slender than Herring Gull with thinner bill. Compared with California Gull, adults are lighter gray on back, thinner billed, and lack red spot on bill.

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