Nick Garbutt / King Penguin (Aptenodytes patagonicus) displaying at hovering Antarctic Tern (Sterna vittata) Beach front, Salisbury Plain, South Georgia, South Atlantic. January

Mike Potts / Antarctic tern (Sterna vittata) feeding well grown chick at nest on a cliff. Campbell Island. Subantarctic New Zealand.

Ingo Arndt / Antarctic tern (Sterna vittata), King Edward Point, South Georgia Island, March

Ingo Arndt / Antarctic tern (Sterna vittata), King Edward Point, South Georgia Island, March

Rick Price / Antarctic Tern (Sterna vittata) flying with fish prey in its beak, South Shetland Island, Antarctica. November.

Ole Jorgen Liodden / Antarctic tern (Sterna vittata) resting on snow, Antarctica, March.

Brent Stephenson / Antarctic tern (Sterna vittata) in breeding plumage calling and displaying near its nest. Deception Island, South Shetlands, Antarctica. December.

Enrique Lopez-Tapia / Antarctic tern (Sterna vittata) in flight above the Antarctic peninsula, Antarctica.

Brent Stephenson / Antarctic Tern (Sterna vittata) in flight overhead. Yalour Islands, Antarctic Peninsula, Antarctica, December.

Ingo Arndt / Antarctic Tern (Sterna vittata), King Edward Point, South Georgia Island

Chris Gomersall / Antarctic terns (Sterna vittata) feeding at glacier face, Drygalski Fjord, South Georgia, Antarctica. January 2007

Chris Gomersall / Antarctic tern (Sterna vittata) hovering in flight. South Georgia, Antarctica.