Bryan and Cherry Alexander / Chinstrap penguins (Pygoscelis antarcticus) and Snowy sheathbill (Chionis alba) on snowy rocks. Half Moon Island, South Shetland Islands, Antarctica, October.

Roy Mangersnes / Snowy Sheathbill (Chionis albus) perched on iceberg, near Useful Island, Antarctica. November.

Gabriel Rojo / Snowy sheathbill {Chionis alba} Patagonia, Argentina

Gabriel Rojo / Snowy sheathbill {Chionis alba} Patagonia, Argentina

Gabriel Rojo / Snowy sheathbill {Chionis alba} Patagonia, Argentina

Konrad Wothe / Pale-faced / Pale faced Sheathbill (Chionis alba) head portrait, Antarctica. February.

Brent Stephenson / Pair of Snowy Sheathbills (Chionis alba) sitting facing each other on a rock. Port Lockroy, Antarctic Peninsula, Antarctica, January.

Brent Stephenson / Snowy Sheathbill (Chionis alba) standing amongst the snow. Port Lockroy, Antarctic Peninsula, Antarctica, December.

Pete Oxford / Snowy Sheathbill (Chionis albus), Stanley, East Falkland Island, Falkland Islands

Martha Holmes / Snowy sheathbill {Chionis alba} chicks with adult on nest in background, Seal Island, Antarctica

Nick Garbutt / Pale-faced Sheathbill (Chionis alba) with preening South Georgia Shag / Comorant (Phalacrocorax georgianus) in forefeound, Gold Harbour, South Georgia, South Atlantic. January.

Tim Laman / Pale-faced / Snowy sheathbills (Chionis alba) perched on boat, Antarctica, January

Tim Laman / Pale-faced / Snowy sheathbill (Chionis alba) in flight, with blood stained feathers, Antarctica, January

Tim Laman / Pale-faced / Snowy sheathbill (Chionis alba) in flight, Antarctica, January

Roy Mangersnes / Snowy Sheathbill (Chionis alba) on Useful Island, Antarctica. November.

Roy Mangersnes / Snowy Sheathbill (Chionis albus) eating pinguin faeces on Useful Island, Antarctica. November.

David Tipling / Pale-faced / Snowy Sheathbill {Chionis alba} pair at prospective nest site, South Georgia, November

David Tipling / Pale faced / Snowy sheathbill (Chionis alba) feeding near a Southern elephant seal (Mirounga leonina) Sea Lion Island, Falklands

David Tipling / Pale faced / Snowy sheathbill (Chionis alba) feeding on King penguin (Aptenodytes patagonicus) skull, South Georgia

Ingo Arndt / Snowy Sheathbill (Chionis albus) pair sitting on rock, Gold Harbor, South Georgia Island

Gabriel Rojo / Gentoo penguin (Pygoscelis papua) feeding young with Snowy sheathbill (Chionis alba) nearby, Port Lockroy, Goudier Island, Antarctic Peninsula, Antarctica, February 2006

Gabriel Rojo / Four Snowy sheathbills (Chionis alba) one landing, Paulet Island, Antarctic Peninsula, Antarctica, February 2006

Gabriel Rojo / Snowy sheathbill (Chionis alba) feeding on a dead Adelie penguin (Pygoscelis adeliae) Paulet Island, Antarctic Peninsula, Antarctica, February

Gabriel Rojo / Snowy sheathbill (Chionis alba) standing on rock, Paulet Island, Antarctic Peninsula, Antarctica, February

Pete Oxford / Snowy Sheathbill (Chionis alba) on beach, Pebble Island, Off north coast of West Falkland, Falkland Islands

Edwin Giesbers / Snowy sheathbill {Chionis alba} Antarctica

Edwin Giesbers / Snowy sheathbill {Chionis alba} Antarctica

Jan Vermeer / Snowy Sheathbill (Chionis albus) flying, Bransfield Strait, Antarctica

Jan Vermeer / Snowy Sheathbill (Chionis albus) flying, Bransfield Strait, Antarctica

Steven Kazlowski / Snowy sheathbill (Chionis alba) perched on a rock. Western Antarctic Peninsula, Southern Ocean

Steven Kazlowski / Snowy sheathbill (Chionis alba) on rock. Western Antarctic Peninsula, Southern Ocean

DAVID TIPLING / Pale-faced / Snowy Sheathbill {Chionis alba} Antarctic Peninsula, Antarctica.

Ian McCarthy / Snowy sheathbill {Chionis alba} Marion Island, sub-antarctica

Hanne & Jens Eriksen / Snowy sheathbill portrait {Chionis alba} Elephant Is Antarctica

Gabriel Rojo / Snowy sheathbill {Chionis alba} feeds from wounds on Elephant seal. Patagonia Argentina