Peter Bassett / King penguins (Aptenodytes patagonicus) wading through mud and falling over, Prion Island, South Georgia.

Peter Bassett / Male Southern elephant seal (Mirounga leonina) shifting position on a beach, surrounded by females, almost crushing a pup, Gold Harbour, South Georgia.Gold Harbour, South Georgia.

Peter Bassett / King penguin (Aptenodytes patagonicus) standing on its heels on a rock to keep its feet warm, Salisbury Plain, South Georgia.

Peter Bassett / Panning shot of a King penguin (Aptenodytes patagonicus) breeding colony, Salisbury Plain, South Georgia.

Peter Bassett / King penguin (Aptenodytes patagonicus), Salisbury Plain, South Georgia.

Peter Bassett / King penguins (Aptenodytes patagonicus) preening in breeding colony, with mountains in the background, Salisbury Plain, South Georgia.

Peter Bassett / King penguins (Aptenodytes patagonicus) entering and leaving the sea near their breeding colony, Salisbury Plain, South Georgia.

Peter Bassett / King penguins (Aptenodytes patagonicus) in a breeding colony, with mountains in the background, Salisbury Plain, South Georgia.

Peter Bassett / King penguins (Aptenodytes patagonicus) walking towards and entering the sea near their breeding colony, Salisbury Plain, South Georgia.

Frederique Olivier / Pair of King penguins (Aptenodytes patagonicus) regurgitating and calling with chick nearby, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Two King penguins (Aptenodytes patagonicus) walking along the shore, shot tilts up from feet to head, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Close-up of a Light-mantled sooty albatross (Phoebetria palpebrata) building its nest, Macquarie Island, Sub-Antarctic Australia.