Barrie Britton / Southern Giant Petrel (Macronectes giganteus), St Andrew's Bay, South Georgia. Photograph taken on location for the BBC Frozen Planet series, October 2009.

Andy Trowbridge / Southern Giant Petrel (Macronectes giganteus) in flight off the coast of Kaikoura, Kaikoura, South Island, New Zealand. February.

Pete Oxford / Southern Giant Petrels (Macronectes giganteus) feeding on the carcass of a Southern Elephant seal bull, killed by Killer whales. Sea Lion Island. South of mainland east Falkland Island. Falkland Islan...

Michael Pitts / Southern giant petrel (Macronectes giganteus) head covered in blood feeding on carcass of an Elephant seal pup, with a penguin colony in the distance, St Andrews Bay, South Georgia

Hanne & Jens Eriksen / Southern Giant Petrel {Macronectes giganteus} resting on rocks, Antarctica.

Stefan Christmann / Giant petrel (Macronectes giganteus) in flight. Atka Bay, Antarctica. January.

Stefan Christmann / Giant petrel (Macronectes giganteus) in flight. Atka Bay, Antarctica. January.

Stefan Christmann / Giant petrel (Macronectes giganteus) in flight. Atka Bay, Antarctica. January.

Stefan Christmann / Giant petrel (Macronectes giganteus) in flight. Atka Bay, Antarctica. January.

Stefan Christmann / Giant petrel (Macronectes giganteus). Atka Bay, Antarctica. February.

Ashley Cooper / Southern giant petrel (Macronectes giganteus) on the beach at Gold Harbour, South Georgia, Southern Ocean. February.

Tony Heald / Southern giant petrel (Macronectes giganteus) fighting with Northern giant Petrel (Macronectes halli). Southern elephant seal (Mirounga leonina) male observing in background. St Andrews Bay, South Ge...

Tony Heald / Southern giant petrel (Macronectes giganteus) and Northern giant Petrel (Macronectes halli) fighting with beaks raised upwards. Southern elephant seal (Mirounga leonina) male observing in background....

Tony Heald / Southern giant petrel (Macronectes giganteus), white colour morph. Right Whale Bay, South Georgia. September.

Agustin Esmoris / Antarctic Giant Petrel (Macronectes giganteus) flying, Puerto Madryn, Argentina

Agustin Esmoris / Antarctic Giant Petrel (Macronectes giganteus) feeding on Southern Right Whale (Eubalaena australis) calf carcass, Puerto Madryn, Argentina

Agustin Esmoris / Antarctic Giant Petrel (Macronectes giganteus) pair feeding on Southern Right Whale (Eubalaena australis) calf carcass, Puerto Madryn, Argentina

Mike Read / Southern giant petrel (Macronectes giganteus) wings spread balancing on slippery dead Killer whale (Orcinus orca) off Sealion Island, Falkland Islands, December.

Mike Read / Southern giant petrel (Macronectes giganteus) feeding on dead Killer Whale (Orcinus orca) off Sealion Island, Falkland Islands, December.

Claudio Contreras / Southern Giant Petrel (Macronectes giganteus) in King penguin (Aptenodytes patagonicus) chick creche looking for prey. Volunteer Point, East Falkland, Falkland Islands, October

Claudio Contreras / Southern Giant Petrel (Macronectes giganteus) feeding on carcass of Southern elephant seal (Mirounga leonina) pup, Sea Lion Island, Falkland Islands, October

Claudio Contreras / Southern Giant Petrel (Macronectes giganteus), Sea Lion Island, Falkland Islands, October

Claudio Contreras / Southern Giant Petrel (Macronectes giganteus), Sea Lion Island, Falkland Islands, October

Frederique Olivier / Giant petrel (Macronectes giganteus) feeding on an Adelie penguin (Pygoscelis adeliae) carcass, Adelie Land, Antarctica, January.

Frederique Olivier / Giant petrel (Macronectes giganteus) feeding on an Adelie penguin (Pygoscelis adeliae) carcass, Adelie Land, Antarctica, January.

Frederique Olivier / Giant petrel (Macronectes giganteus) feeding on an Adelie penguin (Pygoscelis adeliae) carcass, Adelie Land, Antarctica, January.

Peter Bassett / Southern giant petrel (Macronectes giganteus) preening on a beach, with Gentoo penguins (Pygoscelis papua) and Southern elephant seals (Mirounga leonina) in the background, Gold Harbour, South Georgia...

Frederique Olivier / Southern giant petrel (Macronectes giganteus) sitting in grass, gets up and moves around, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Wide angle shot of Southern giant petrels (Macronectes giganteus), Cape petrels (Daption capense) and a Fur seal (Arctocephalus) feeding amongst kelp, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Wide angle shot of Southern giant petrels (Macronectes giganteus), Cape petrels (Daption capense) and a Fur seal (Arctocephalus) feeding amongst kelp, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) in a King penguin (Aptenodytes patagonicus) colony, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) resting along the edge of the shore, lacking alertness, potentially due to secondary poisoning from pest eradication, Macquarie Island, Sub-Antarctic Aust...

Frederique Olivier / Southern giant petrel (Macronectes giganteus) walking along the shore, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) resting in grass, with poisoning caused by secondary ingestion of brodifacoum, used for pest eradication, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Close-up of a Southern giant petrel (Macronectes giganteus) resting on a beach, preening, with waves breaking behind, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Wide shot of a group of Southern giant petrels (Macronectes giganteus) landed on water in a bay, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) eating a penguin carcass from the surface of the sea, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Close-up of a Southern giant petrel (Macronectes giganteus) standing wings outstretched in strong winds, with waves in the background, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) standing wings outstretched in strong winds, with waves breaking, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) taking off and landing on the sea, with large waves, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) feeding on a Gentoo penguin (Pygoscelis papua) chick carcass, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) displaying aggressively, with a Royal penguin (Eudyptes schlegeli) colony in the background, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Group of Southern giant petrels (Macronectes giganteus) fighting over a dead Royal penguin (Eudyptes schlegeli), with a penguin colony in the background, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Group of Southern giant petrels (Macronectes giganteus) fighting over a dead Royal penguin (Eudyptes schlegeli), with a penguin colony in the background, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) scavenging a dead Gentoo penguin (Pygoscelis papua) chick in front of a Southern elephant seal (Mirounga leonina), Macquarie Island, Sub-Antarctic Austral...

Frederique Olivier / Southern giant petrels (Macronectes giganteus) fighting over a dead Royal penguin (Eudyptes schlegeli) chick, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrels (Macronectes giganteus) fighting over and feeding on a dead Royal penguin (Eudyptes schlegeli) chick, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) feeding on a dead Southern elephant seal (Mirounga leonina) and displaying aggressively to another bird nearby, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) feeding on a dead Royal penguin (Eudyptes schlegeli) chick, Macquarie Island, Sub-Antarctic Australia.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) competing with a group of Subantarctic skuas (Stercorarius antarcticus) to feed on a dead Royal penguin (Eudyptes schlegeli) chick, Macquarie Island, Sub-...

Frederique Olivier / White Southern giant petrel (Macronectes giganteus) walking to the sea and drinking, Macquarie Island, Sub-Antarctic Australia.

Andy Trowbridge / Southern giant petrels (Macronectes giganteus) on the ocean. Kaikoura, South Island, New Zealand. January.

Andy Trowbridge / Southern giant petrel (Macronectes giganteus) in flight. Kaikoura, South Island, New Zealand. January.

Andy Trowbridge / Southern giant petrel (Macronectes giganteus) portrait. Kaikoura, South Island, New Zealand. January.

Ingo Arndt / Antarctic Giant Petrel (Macronectes giganteus) adult with chick at nest, Greene Peninsula, South Georgia Island, March

Ingo Arndt / Antarctic Giant Petrel (Macronectes giganteus) adult with chick at nest, Greene Peninsula, South Georgia Island, March

Ingo Arndt / Antarctic Giant Petrel (Macronectes giganteus) adult with chick at nest, Greene Peninsula, South Georgia Island, March

Ingo Arndt / Antarctic Giant Petrel (Macronectes giganteus) chick at nest, Greene Peninsula, South Georgia Island, March

Ingo Arndt / A pair of Antarctic Giant Petrels (Macronectes giganteus) swimming, South Georgia Island, Southern Ocean, Antarctic Convergence.

Ingo Arndt / Antarctic Giant Petrel (Macronectes giganteus) on water, South Georgia Island, Southern Ocean, Antarctic Convergence.

Ingo Arndt / Antarctic Giant Petrel (Macronectes giganteus) feeding on carcass of Southern Elephant Seal (Mirounga leonina), South Georgia Island, Southern Ocean, Antarctic Convergence.

Sylvain Cordier / Southern giant-petrel (Macronectes giganteus) in flight, New Island, Falklands islands

Sylvain Cordier / Southern giant-petrel (Macronectes giganteus), adult at the nest with a chick, Pebble island, Falkland Islands

Sylvain Cordier / Southern giant-petrel (Macronectes giganteus), adult at the nest with a chick, Pebble island, Falkland Islands

Glenn Bartley/ BIA / Antarctic Giant Petrel (Macronectes giganteus) flying over the ocean searching for food near South Georgia Island

David Tipling / Southern Giant petrel (Macronectes giganteus) adult with chick at nest, King Haakon Bay, South Georgia January

David Tipling / Southern Giant petrel (Macronectes giganteus) adult light morph known as a "Wjite Nelly" taking off Albatross Island, South Georgia January

Mark Carwardine / Northern Giant Petrel (Macronectes halli) fighting with Antarctic Giant Petrel (Macronectes giganteus), Gold Harbor, South Georgia Island

Chris & Monique Fallows / Southern giant petrel (Macronectes giganteus), scavenging on seal carcass, South Georgia, January.

Brent Stephenson / Southern giant petrel (Macronectes giganteus) killing a Southern giant petrel chick, Livingston Island, South Shetland Islands, Antarctica, January.

Brent Stephenson / Southern giant petrel (Macronectes giganteus) feeding on the remains of a King penguin (Aptenodytes patagonicus) Gold Harbour, South Georgia, South Atlantic, January.

Frederique Olivier / Emperor penguin (Aptenodytes forsteri) adults huddling together to protect chicks from Southern giant petrel (Macronectes giganteus) Antarctica.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) predation of Emperor penguin (Aptenodytes forsteri) chick, Antarctica.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) in flight, Antarctica.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) sitting in snow in front of penguin colony, Antarctica.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) sitting on nest with feather in beak, Adelie Land, Antarctica

Frederique Olivier / Southern giant petrel (Macronectes giganteus) predation of Emperor penguin (Aptenodytes forsteri) chick, Antarctica.

Frederique Olivier / Southern giant petrel (Macronectes giganteus) with chick at colony, Adelie Land, Antarctica

Tui De Roy / Southern giant petrel (Macronectes giganteus) flying, Antarctica, November.

Mike Potts / Southern giant petrel (Macronectes giganteus) white phase, flying off Buckle Island, Balleny Islands, Antarctica, February.

Mike Potts / Southern giant petrel (Macronectes giganteus) white phase, flying off Buckle Island, Balleny Islands, Antarctica, February.

Tim Laman / Southern giant petrel (Macronectes giganteus) chick on nest, Fortuna Bay, South Georgia.

Gabriel Rojo / Giant petrel (Macronectes giganteus) swimming, Valdes Peninsula, Chubut, Patagonia, Argentina.

Brent Stephenson / Juvenile Southern giant petrel (Macronectes giganteus) walking along the shoreline with wings outstretched. Sea Lion Island, Falkland Islands, South Atlantic, April.

Michael Pitts / Southern Giant Petrel (Macronectes giganteus) feeding on a Southern Elephant Seal (Mirounga leonina) pup. St Andrews Bay - South Georgia.

Hiroya Minakuchi / Antarctic Giant Petrel (Macronectes giganteus) scavenging an Antarctic Fur Seal (Arctocephalus gazella) carcass, South Georgia Island

Hiroya Minakuchi / Antarctic Giant Petrel (Macronectes giganteus) trio scavenging an Antarctic Fur Seal (Arctocephalus gazella) carcass, South Georgia Island

Chris & Monique Fallows / Southern Giant Petrel (Macronectes giganteus), white morph, with oil stains, Cape Point, South Africa, September.

E.J. Peiker / Antarctic Giant Petrel (Macronectes giganteus), Antarctica

E.J. Peiker / Antarctic Giant Petrel (Macronectes giganteus), Antarctica

Franco Banfi / Southern Giant-Petrel (Macronectes giganteus) feeding on dead calf of Southern right whale (Eubalaena australis) Puerto Piramides, Golfo Nuevo, Peninsula Valdes UNESCO Natural World Heritage Site, Chu...

Franco Banfi / Southern Giant-Petrel (Macronectes giganteus) feeding on dead calf of Southern right whale (Eubalaena australis) Puerto Piramides, Golfo Nuevo, Peninsula Valdes UNESCO Natural World Heritage Site, Chu...

David Tipling / Southern Giant Petrel (Macronectes giganteus) fighting over a penguin carcass, St Andrews Bay, South Georgia

Konrad Wothe / Northern Giant Petrel swimming (Macronectes halli) South Georgia, Antarctic. February.

Konrad Wothe / Northern Giant Petrel (Macronectes halli) in flight South Georgia, Antarctica. February.

Mary McDonald / Giant petrel (Macronectes giganteus) portrait, Grytviken Whale Station, St. Andrew Bay, South Georgia Island, March