Black-tailed gull (Larus crassirostris)

Larus crassirostris is a species in the Larus genus. It is commonly known as Black-tailed gull This name is unplaced name for the species in the family Laridae subfamily Larinae, . This species is found in coastlines of the East China Sea, Japan, Manchuria and the Kuril Islands, to Alaska and North America.