Jessie Lane / Great skua, Godthill Harbour, South Georgia, Antarctica.

Brent Stephenson / Brown Skua (Stercorarius / Catharacta antarcticus) landing on a rock, against a blue sky. Neko Harbour, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Brown Skua (Stercorarius / Catharacta antarcticus) coming in to land. Mikkelsen Harbour, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / South Polar Skua (Stercorarius / Catharacta maccormicki) patrolling a Gentoo Penguin (Pygoscelis papua) rookery, with Penguins warning it off. Aitcho Island, South Shetland Islands, Antarctica, Decemb...

Tui De Roy / South Polar Skua (Stercorarius maccormicki) with Emperor Penguin (Aptenodytes forsteri) chick carcass, Prydz Bay, eastern Antarctica

Tui De Roy / South Polar Skua (Stercorarius maccormicki) pair fighting over Emperor Penguin (Aptenodytes forsteri) chick carcass, Prydz Bay, eastern Antarctica

Pete Oxford / Antarctic Skua (Catharacta antarctica) eating penguin egg, Saunders Island, Falkland Islands

Gabriel Rojo / South polar skua (Catharacta / Stercorarius maccormicki) feeding on dead Adelie Penguin (Pygoscelis adeliae) Paulet Island, Antarctic Peninsula, Antarctica, February

Gabriel Rojo / South polar skua (Catharacta / Stercorarius maccormicki) feeding on dead Adelie Penguin (Pygoscelis adeliae) Paulet Island, Antarctic Peninsula, Antarctica, February

Pete Oxford / Antarctic Skua (Catharacta antarctica), Pebble Island, Falkland Islands

Roy Mangersnes / Giant petrels (Macronectes sp.) and Subantarctic skua (Catharacta antarctica lonnbergi) fighting over a seal carcass, Gold Harbour, Southern Ocean, Antarctica. November

Yva Momatiuk & John Eastcott / Antarctic Skua (Catharacta antarctica) pecking torn flesh on bloody nose of Southern Elephant Seal (Mirounga leonina) bull wounded during fight for access to females, St. Andrews Bay, South Georgia Is...

Yva Momatiuk & John Eastcott / Antarctic Skua (Catharacta antarctica) pair feeding on carcass of Southern Elephant Seal (Mirounga leonina) pup, St. Andrews Bay, South Georgia Island

Edwin Giesbers / Great Skua {Catharacta skua} Antarctica

Edwin Giesbers / Catharacta skua {Great Skua} Antarctica

Edwin Giesbers / Great Skua {Catharacta skua} Antarctica

Suzi Eszterhas / Black-browed Albatross (Thalassarche melanophrys)in flight with Brown Skua (Catharacta antarctica) in background, Steeple Jason, Falkland Islands

Jan Vermeer / Antarctic Skua (Catharacta antarctica) pair, Cuverville Island, Antarctica

Jan Vermeer / Gentoo Penguin (Pygoscelis papua) and Antarctic Skua (Catharacta antarctica) group on mountain ridge, Port Lockroy, Antarctica

Jan Vermeer / Antarctic Skua (Catharacta antarctica) bathing, Cuverville Island, Antarctica

Jan Vermeer / Antarctic Skua (Catharacta antarctica) flying, Cuverville Island, Antarctica

Jan Vermeer / Antarctic Skua (Catharacta antarctica) pair fighting over carcass, Cuverville Island, Antarctica

Tui De Roy / Antarctic Skua (Catharacta antarctica) parent and chick at nest in open moorland, Gough Island, South Atlantic

Jim Henderson / Antarctic Skua (Catharacta antarctica) pair calling, Campbell Island, New Zealand

Steven Kazlowski / Antarctic skua (Catharacta Antarctica) chick on mosses. Western Antarctic Peninsula, Southern Ocean

Steven Kazlowski / Antarctic skua (Catharacta Antarctica) eggs in nest, western Antarctic Peninsula, Southern Ocean

Steven Kazlowski / Antarctic skua (Catharacta Antarctica) chick huddled amongst rocks on the western Antarctic Peninsula, Southern Ocean

Suzi Eszterhas / Great Skua (Catharacta skua) adult with chick, Shingle Cove, Coronation Island, South Orkney Island

TJ Rich / Antarctic / South Polar Skua (Catharacta / Stercoraius antarcticus) Antarctica

Solvin Zankl / Gentoo penguin {Pygoscelis papua} confronting Brown Skua {Catharacta antarctica} with chick, Falkland Islands.

Solvin Zankl / Brown Skua (Catharacta antarctica) flying over Gentoo Penguin (Pygoscelis papua) rookery, Falkland Islands.

Flip de Nooyer / Great Skua (Catharacta skua) adult portrait, Antarctica

Onne van der Wal / Dying Chinstrap penquin (Pygoscelis antarctica) covered in blood with a scavenging southern Giant petrel (Macronectes giganteus) and Great skua (Catharacta skua), South Georgia.

Tui De Roy / South Polar Skua (Stercorarius maccormicki) pair fighting over Emperor Penguin (Aptenodytes forsteri) chick carcass, Prydz Bay, eastern Antarctica

Tui De Roy / South Polar Skua (Stercorarius maccormicki) bathing, Prydz Bay, eastern Antarctica

Jan Vermeer / Antarctic Skua (Catharacta antarctica) bathing, Antarctica

Ben Osborne / Antarctic skua pair territorial display {Catharacta antarctica} Falkland Is