Coastal birds are a diverse group of avian species that inhabit the shorelines of oceans, seas, and other bodies of water. SEAFOWL, such as ducks, geese, and swans, are some of the most common coastal birds. Erns, terns, and ernes are also members of this group. Erns are medium-sized seabirds that have long wings and short legs, while terns are smaller birds with long, forked tails and pointed wings. Ernes are similar to terns but have shorter tails and more rounded wings. All of these birds can be found in coastal areas around the world.