Juvenile Antarctic tern (Sterna vittata) resting on ship's rail near Tristan da Cunha, South Atlantic Ocean

antarctic tern sterna vittata juvenile bird marine bird seabird shorebird wildlife nature ornithology birdwatching avian species coastal habitat migratory bird animal behavior bird plumage shipping rail ocean view sea habitat birding marine ecosystem rare birds biodiversity juvenile wildlife island ecology coastal birds terns bird conservation seabird habitat animal watching marine wildlife ship observation nature exploration bird ecology coastal environment sea birds wildlife enthusiasts natural habitat juvenile seabird animal resting wildlife conservation bird identification cultural significance juvenile antarctic tern sterna