Adult gentoo penguin (Pygoscelis papua), returning from the sea at Booth Island, Antarctica, Southern Ocean, Polar Regions

gentoo penguin pygoscelis papua penguin booth island antarctica southern ocean returning swimming wildlife polar regions ocean sea foraging adult penguin marine life seabird aquatic nature animal behavior cold climate adaptation biodiversity coastal cruising saltwater shore island fauna migratory bird depth feathers orange beak cold water swimming behavior exploration male penguin female penguin habitat antarctic environment polar animal arctic ecosystem natural behavior penguin species animal migration water surface penguin colony marine ecosystem icy waters feeding grounds