Larus fuscus

The Lesser Black-backed Gull is a medium-sized gull with a dark grey back, yellow legs and a yellow bill marked with red. It breeds mainly in Europe and has become increasingly regular in North America. Records remain uncommon on the Pacific coast. The species eats fish, invertebrates, eggs, carrion and human refuse. Adults acquire their full dark-backed plumage gradually over several years.
Locations where this species is supported by a dated first record, an unambiguous single-place outing or a reviewed assignment.