The term 'Fork-tailed Gull' is a type of seabird known as a TERN (4 letters). It is a medium-sized bird with a long, forked tail and a white body. It has a black cap on its head and a black line running down its back. The Fork-tailed Gull is found in coastal areas of the Atlantic and Pacific oceans, and is known for its graceful flight and loud calls. It feeds mainly on small fish and crustaceans, and nests in colonies on beaches and islands.