Marine fliers are a group of seabirds that includes the ERNS, TERNS, and ERNES. ERNS are small, short-tailed seabirds with long wings and a forked tail. They feed on fish and other small aquatic animals. TERNS are medium-sized seabirds with long wings and a forked tail. They feed on fish, crustaceans, and other small aquatic animals. ERNES are large, long-winged seabirds with a forked tail. They feed on fish, crustaceans, and other small aquatic animals. All three species of marine fliers are found in coastal areas around the world.