Ring-billed gull

Ring-billed gull
Breeding adult in Toronto, Ontario, Canada
Non-breeding adult at Sandy Point State Park, Maryland
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Laridae
Genus: Larus
Species:
L. delawarensis
Binomial name
Larus delawarensis
Ord, 1815

The ring-billed gull (Larus delawarensis) is a medium-sized gull native to North America, breeding in Canada and the northern Contiguous United States, and wintering mainly in the United States and northern Mexico. The genus name is from Latin Larus which appears to have referred to a gull or other large seabird. The specific delawarensis refers to the Delaware River.