is a specific kind of: bird genus.

has as a member: Larus canus, mew, mew gull, sea mew | black-backed gull, cob, great black-backed gull, Larus marinus | herring gull, Larus argentatus | blackcap, Larus ridibundus, laughing gull, pewit, pewit gull.

is a member of: family Laridae, Laridae.