An adult brown skua (Stercorarius spp), in flight with a stolen penguin egg at Barrientos Island, Antarctica, Polar Regions

An adult brown skua (Stercorarius spp), with a stolen penguin egg at Barrientos Island, Antarctica, Polar Regions

Antarctic shag (Leucocarbo bransfieldensis) in breeding plumage, Barrientos Island, Antarctica, Polar Regions

Antarctic shag (Leucocarbo bransfieldensis) in breeding plumage, Barrientos Island, Antarctica, Polar Regions

Chinstrap penguin (Pygoscelis antarcticus), leaping from the sea at breeding colony on Barrientos Island, Antarctica, Polar Regions

Adult snowy sheathbill (Chionis albus), courtship display on Barrientos Island, Aitcho Island Group, Antarctica, Polar Regions

A gentoo penguin (Pygoscelis papua), chick with its parent on Barrientos Island, Aitcho Island Group, Antarctica, Polar Regions

A gentoo penguin (Pygoscelis papua), parent feeding a chick on Barrientos Island, Aitcho Island Group, Antarctica, Polar Regions

An adult brown skua (Stercorarius antarcticus), harassing a gentoo penguin on Barrientos Island, Antarctica, Polar Regions

Adult gentoo penguins (Pygoscelis papua), on nests at Barrientos Island, South Shetland Islands, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis papua), mating at breeding colony on Barrientos Island, Antarctica, Polar Regions

Southern elephant seals (Mirounga leonina), hauled out on the beach, Barrientos Island, Antarctica, Polar Regions

A gentoo penguin (Pygoscelis papua) chick with its parent on Barrientos Island, Aitcho Island Group, Antarctica, Polar Regions

Gentoo penguins (Pygoscelis papua), at breeding colony on Barrientos Island, Antarctica, Polar Regions

Southern elephant seals (Mirounga leonina) hauled out on the beach, Barrientos Island, Antarctica, Polar Regions

Young southern elephant seal (Mirounga leonina), hauled out on the beach, Barrientos Island, Antarctica, Polar Regions

Southern elephant seals (Mirounga leonina), hauled out on the beach, Barrientos Island, Antarctica, Polar Regions