skua

noun
  1. A large seabird belonging to the family Stercorariidae, known for its aggressive behavior, particularly in stealing food from other birds. Skuas are found in both the Northern and Southern Hemispheres. noun
    The skua swooped down to snatch the fish from the gull's beak.
    During the breeding season, skuas become particularly territorial and aggressive.
  2. A term used to describe any of the various species within the genus Stercorarius, which includes birds like the great skua and the Arctic skua. noun
    The Arctic skua is known for its long migrations and kleptoparasitic behavior.
    Birdwatchers were thrilled to spot a great skua during their coastal expedition.