skua

Skuas are predatory seabirds belonging to the family Stercorariidae. In American English, the term "skua" often refers to the great skua (Catharacta skua), while in Britain, "skua" can also include smaller birds known as jaegers in the U.S..12

The great skua is a large, heavy-bodied bird with brownish plumage and distinctive white wing patches. It is unique in that it breeds in both the Arctic and Antarctic regions. Skuas are known for their aggressive behavior, often forcing other birds to regurgitate their food and preying on the eggs and young of seabirds like penguins and terns. They also supplement their diet with lemmings and carrion.1

Skuas are agile and swift flyers. After breeding, they migrate to sea, with southern populations moving northward across the Equator and northern populations reaching tropical waters.1