Migratory seabirds are birds that travel long distances over open water, often between breeding and wintering grounds. Terns are a type of migratory seabird that are characterized by their long, pointed wings and forked tails. They are found in many parts of the world, including coastal areas, islands, and inland wetlands. Terns feed on small fish, crustaceans, and insects, and they nest in colonies on the ground or on cliffs.