Richard Du Toit / Spotted hyaena {Crocuta crocuta} with Buffalo bone. Moremi WR Botswana

DAVID TIPLING / Snow bunting {Plectrophenax nivalis} in winter.

Mike Wilkes / Snow bunting in snow {Plectrophenax nivalis} Cairngorms, Scotland, UK

DAVID TIPLING / Snow Bunting {Plectrophenax nivalis} male perching in winter, Cairngorms, Scotland, UK.

Niall Benvie / Snow bunting in winter {Plectrophenax nivalis} Scotland

Philippe Clement / Snow bunting in winter {Plectrophenax nivalis} Belgium

Tom Vezo / Snow buntings (Plectrophenax nivalis) winter plumage. USA Long Island, New York

Mike Potts / Snow bunting feeding chick {Plectrophenax nivalis} Svalbard, Norway

David Kjaer / Snow bunting male in snow {Plectrophenax nivalis} Cairngorms, Scotland, UK

Glenn Bartley/ BIA / Snow Bunting (Plectrophenax nivalis) male, Alaska

Tim Zurowski / Snow Bunting (Plectrophenax nivalis), British Columbia, Canada

Sergey Gorshkov / Snow Bunting (Plectrophenax nivalis) male in breeding plumage, Wrangel Island, Russia

Sergey Gorshkov / Snow Bunting (Plectrophenax nivalis) male calling on rock pile, Wrangel Island, Russia

Robin Chittenden / Male Snow bunting (Plectrophenax nivalis) feeding, Salthouse, Norfolk, England, January

Gary K. Smith / Snow Bunting (Plectrophenax nivalis) flock flying over coastal saltings, North Norfolk, England, UK, February

David Kjaer / Snow buntings feeding on ground {Plectrophenax nivalis} Norfolk Coast, England

Mike Wilkes / Snow bunting in snow {Plectrophenax nivalis} Cairngorms, Scotland, UK

David Kjaer / Flock of Snow buntings feeding {Plectrophenax nivalis} Norfolk, UK

Tom Vezo / Snow bunting chick {Plectrophenax nivalis} St Paul Is, Alaska, USA

Marie Read / Snow buntings (Plectrophenax nivalis) large flock in flight with American beech (Fagus grandifolia) saplings behind, Vermont, USA. January.

David Tipling / Snow bunting (Plectrophenax nivalis) flock in flight, Holkham, Norfolk, England, UK. December.

David Tipling / Snow bunting (Plectrophenax nivalis) flock in flight, Holkham, Norfolk, England, UK. December.

Marie Read / Snow buntings (Plectrophenax nivalis) large flock taking flight in winter, Vermont, USA. January.

Espen Bergersen / Snow bunting (Plectrophenax nivalis) chicks in nest, begging for food, Svalbard, Norway. July.

Espen Bergersen / Snow bunting (Plectrophenax nivalis) flock in flight during spring migration, with snow-covered mountains in background, Andoya, Norway. April.

Espen Bergersen / Snow bunting (Plectrophenax nivalis) flock in flight during spring migration, Andoya, Norway. April.

Espen Bergersen / Two Snow buntings (Plectrophenax nivalis) in flight, Andoya, Norway. April.

Espen Bergersen / Flock of Snow buntings (Plectrophenax nivalis) flying during spring migration. Andoya, Vesteralen archipelago, Norway. March.

David Tipling / Snow bunting (Plectrophenax nivalis) flock in flight, Cley, Norfolk, UK. January.

SCOTLAND: The Big Picture / Snow bunting (Plectrophenax nivalis) on beach in winter, Scotland, UK. December.

SCOTLAND: The Big Picture / Snow bunting (Plectrophenax nivalis) on beach in winter, Scotland, UK. December.

Terry Whittaker / Snow bunting (Plectrophenax nivalis) catching insects on a beach, Hornstrandir Nature Reserve, Westfjords, Iceland.

Konrad Wothe / Snow bunting (Plectrophenax nivalis) flock in flight, brown feathers visible, Iceland. March.

Konrad Wothe / Snow bunting (Plectrophenax nivalis) flock resting on a roof, Iceland. March.

Konrad Wothe / Snow buntings (Plectrophenax nivalis), flock on roof, winter, Iceland,

Jussi Murtosaari / Snow bunting (Plectrophenax nivalis) flock in flight, woodland in background. Jyvaskyla, Finland. April.

Oscar Dewhurst / Snow bunting (Plectrophenax nivalis) perched on rock. Durham, UK. February

Oscar Dewhurst / Snow bunting (Plectrophenax nivalis) male perched on wasteground. Durham, England, UK. February

Marie Read / Snow Bunting (Plectrophenax nivalis) banking in flight over snow-covered field, others flying in the background, Ithaca, New York, USA Digitally retouched image (distraction removed from background)

Espen Bergersen / Snow buntings (Plectrophenax nivalis) resting in a tree in Tromso, Northern Norway.

Guy Edwardes / Snow bunting (Plectrophenax nivalis) flock in flight, Ontario, Canada

Guy Edwardes / Snow bunting (Plectrophenax nivalis) group of three in snow, Ontario, Canada, January.

Guy Edwardes / Snow bunting (Plectrophenax nivalis) in flight, Ontario, Canada, January.