The Family Stercorariidae comprises the skuas and jaegers, medium-to-large seabirds found in coastal and open ocean regions, particularly in the Northern Hemisphere. These birds are known for their strong, agile flight and predatory or kleptoparasitic behavior, often harassing other seabirds to steal food. Skuas have robust bodies, hooked bills, and webbed feet, adaptations that make them effective hunters of fish, eggs, chicks, and even small mammals. Most species breed in polar or subpolar regions, nesting on the ground, and migrate long distances during the non-breeding season. Stercorariidae play an important ecological role as both predators and scavengers in marine and coastal ecosystems.