The crossword solution for the term 'Fork-tailed Sea Bird' is TERN. Terns are a group of seabirds that have long, forked tails and narrow wings. They are found in many parts of the world, including coastal areas, islands, and inland lakes. They feed on small fish, crustaceans, and insects. Terns are known for their graceful flight and are often seen hovering over the water before diving for food.