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

antarctic tern juvenile bird seabird wildlife nature birdwatching marine environment coastal migration avian ornithology animal behavior resting shorebirds ocean habitat conservation biodiversity marine life exploration sailing feathers wildlife observation natural habitat seabird species atlantic seabirds juvenile species bird identification pelagic birds coastal scenery ecological balance sea travel bird enthusiasts wildlife habitat birding fauna oceanic species natural beauty marine ecosystem naturalist activities shorelines avifauna conservation efforts juvenile antarctic tern sterna