black-backed gull

noun

1. any of several white gulls, as Larus marinus (great black-backed gull), having a black back and wings.

noun

1. either of two common black-and-white European coastal gulls, Larus fuscus (lesser black-backed gull) and L. marinus (great black-backed gull)
2. Also called: karoro a southern gull, larus dominicanus, with black feathers on its back