Adelie penguin (Pygoscelis adeliae) adult defending chick against a skua on Torgersen Island, Antarctica, Polar Regions

adelie penguin skua chick torgersen island antarctica wildlife mother protection survival nature birds polar region defense instinct behavior ecosystem marine feeding avian species parental care predators instinctual behavior rocky terrain cold climate animal interaction breeding nesting antarctic wildlife flightless birds natural habitat social behavior seabirds antarctic ecosystem conservation biodiversity territorial flock mating incubation animal kingdom thriving wildlife dynamics weather conditions