Ключевые слова: animals, antarctic, antarctica, aquatic, arctic, avian, behavior, birds, circle, climate, cold, coldblooded, colony, conservation, diving, ecosystem, feathers, flightless, flippers, floating, group, habitat, hemisphere, icy, life, marine, natural, nature, ocean, penguins, sea, social, socializing, southern, submerged, swim, swimming, water, wildlife,