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.

Bryan and Cherry Alexander / King penguins (Aptenodytes patagonicus), Snowy sheathbills (Chionis alba) and Elephant seal (Mirounga genus) on the shore at Gold Harbour, South Georgia.

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