Adult South Georgia pipit (Anthus antarcticus) feeding at low tide on Prion Island, Bay of Isles, South Georgia, Polar Regions

anthus antarcticus feeding low tide prion island polar regions birdwatching invertebrates wildlife nature habitat migration coastal shorebird ecology behavior forage adult bird brown feathers rocky surface water tide pool feeding habits endemic species avian conservation biodiversity remote island south georgia natural behavior small bird shore mud wetland natural habitat prey ecosystem light conditions solitary bird environment animal behavior southern ocean feeding ground species observation animal ecology bird identification