Adult Antarctic tern (Sterna vittata) in flight near Tristan da Cunha, South Atlantic Ocean

antarctic tern sterna vittata bird flight soaring wildlife nature avian ocean wings feathers red legs seabird migratory bird coastal habitat natural habitat feeding marine environment conservation animal behavior flight pattern beauty outdoor tropical clear sky summer blue adventure natural world ecosystems biodiversity avifauna ornithology endemic species stunning sight wildlife observation birdwatching horizon exploration relaxing scene wildlife sanctuary preservation remote island bird species