King penguin (Aptenodytes patagonicus) with introduced reindeer at breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean, Polar Regions

king penguin reindeer nesting season wildlife ecosystem animal behavior grazing biodiversity nature conservation species interaction habitat tundra reindeer sighting forage wildlife observation fauna ecology marine life antarctic region animal ecology grassland coastal environment penguin behavior introduced species habitat interaction southern hemisphere wildlife sanctuary natural habitat arctic fauna cold climate animal migration animal species wild animals grazing patterns great migration ecological balance south atlantic king penguin aptenodytes patagonicus introduced breeding nesting colony