Gulls' kin are two species of seabirds, terns and TERN. Terns are medium-sized seabirds that have long wings, a forked tail, and webbed feet. They are found in coastal areas around the world and feed on fish, crustaceans, and other small aquatic animals. Terns are known for their graceful flight and often travel in large flocks. TERN is a smaller species of seabird that is closely related to terns. They are found in coastal areas of the Northern Hemisphere and feed on small fish and insects. They are also known for their graceful flight and often travel in large flocks.