Adult Subantarctic Skua (Catharacta antarctica lonnbergi) on tussac at Salisbury Plain on South Georgia Island, Polar Regions

tussac grass salisbury plain polar regions seabird wildlife nature ecosystem grassland breeding ground coastal habitat marine environment avian species native wildlife remote islands southern ocean conservation biodiversity foraging behavior predator scavenger birdwatching natural habitat animal behavior cold climate high latitude ecological balance mountainous landscape migratory patterns nesting site territorial display food chain wildlife observation rugged terrain sea level coastal ecosystem subantarctic fauna scenic view indigenous species habitat preservation coastal vegetation ecological diversity flightless birds breeding season south atlantic coastal tundra island ecology avifauna ornithology wildlife habitat biodiversity hotspots