Ring-billed Gull	(Larus delawarensis)
Photographed in Palo Alto, California and Ft. Myers Beach, Florida, by Jim Rosso	The top picture is an adult bird in winter plumage.
	Charadriiformes	Natural History Notes

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Other members of the genus Larus: Mew Gull Western Gull Yellow-footed Gull California Gull Heermann's Gull Laughing Gull Franklin's Gull Bonaparte's Gull Glaucous-winged Gull Great Black-backed Gull American Herring Gull