skua

Any of several large predatory seabirds of the genus Stercorarius, especially the great skua.

Any of several of the smaller seabirds of the genus Stercorarius.

A gull-like predatory bird of the family Laridæ and subfamily Stercorariinæ or Lestridinæ, especially Stercorarius or Megalestris catarractes, or M. skua, the species originally called by this name, which has since been extended to the several others of the same subfamily.

Any jager gull; especially, the Megalestris skua; — called also boatswain.

Any of various predatory seabirds of the family Stercorariidae that often chase other seabirds to steal their catches.

gull-like jaeger of northern seas