Skua

A large seabird in the family Stercorariidae, skuas pursue other birds to steal food and also hunt prey directly.

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Kleptoparasitism: Kleptoparasitism is the acquisition of food by stealing it from another animal. Skuas force other seabirds to drop or regurgitate food, making theft a signature feeding tactic.
Stercorariidae: Stercorariidae is a family of seabirds comprising skuas and jaegers. It is the taxonomic family to which skuas belong.
South polar skua: The south polar skua is a large skua that breeds in Antarctica and nearby islands. Its breeding colonies illustrate skuas’ role as predators in Antarctic ecosystems.
Pomarine jaeger: The pomarine jaeger is a migratory seabird that breeds in the Arctic and winters mainly at sea. It is a jaeger rather than a large skua, despite sharing aerial food theft.
Parasitic jaeger: The parasitic jaeger is a migratory Arctic seabird that steals food from other birds in flight. This smaller relative uses aerial pursuit to obtain food in the same way.
Charadriiformes: Charadriiformes is a large order of birds that includes shorebirds, gulls, auks, and their relatives. Skuas belong to this broader order of birds.
Great skua: The great skua is a large North Atlantic seabird that breeds on islands and coasts. It is a familiar northern example of a skua defending territory and taking food from other birds.
Long-tailed jaeger: The long-tailed jaeger is a slender Arctic seabird recognized by its elongated central tail feathers. Its lighter build and long tail contrast with the bulkier appearance of many skuas.
Antarctic petrel: The Antarctic petrel is a seabird that breeds in Antarctica and feeds mainly at sea. Petrels are among the seabirds skuas may chase for food.
Seabird: A seabird is a bird adapted to feeding at sea, often spending much of its life on the ocean. Skuas are seabirds whose feeding and breeding connect land and ocean.