Orsolya Haarberg / Norway spruce (Picea abies) trees covered in snow, Ciuc Mountains, Transylvania, Romania, January 2015.
Erlend Haarberg / Frost covered European beech tree (Fagus sylvatica) in a snow covered field framed by frosty branches, Calonda, Harghita County, Transylvania, Romania, January.
Pal Hermansen / Whooper swans (Cygnus cygnus) flock in spring, Lake Tysslingen, central Sweden March
Nick Garbutt / Sun beam at sun rise over the Grand Canyon of the Yellowstone, Yelllowstone National Park, Wyoming, USA. January 2016.
Carol Walker / RF - Grey Andalusian mare running in snow, Berthoud, Colorado, USA. January.
Floris van Breugel / First rays of golden sunshine hit Giant Sequoias (Sequoiadendron giganteum) covered in a winter blanket of snow and frost, Grant Grove, Sequoia / Kings Canyon National Park, California, USA November
Matthew Maran / European robin (Erithacus rubecula) Hampstead Heath, London, England, UK. January.
Eric Baccega / Nenet herders travel by Reindeer (Rangifer tarandus) sled on spring migration across tundra. Yar-Sale district, Yamal, Northwest Siberia, Russia. April 2016.
Danny Green / Atlantic Puffin (Fratercula arctica) flock resting on a snow bank, Horn°ya, Varanger, Norway, April
Eric Baccega / RF - Portrait of Harp seal (Phoca groenlandicus) pup on sea ice. Magdalen Islands, Gulf of St Lawrence, Quebec, Canada.
Eric Baccega / Reindeer (Rangifer tarandus) herd migrating in spring dusk under moon. Yar-Sale district, Yamal, Northwest Siberia, Russia. April.
Pal Hermansen / Polar bear (Ursus maritimus) on belly and forepaws with legs stretched out behind on ice floe, Svalbard, Norway, September.
Eric Baccega / Head portrait of ice covered Reindeer (Rangifer tarandus) during storm. Yar-Sale district, Yamal, Northwest Siberia, Russia. April.
David Pattyn / Trees in Hautes Fagnes Nature Reserve in winter after snowfall. This area - Noir Flohay was burnt a few years ago and some trees are still blackened, Hautes Fagnes, Belgian Ardennes, Belgium, February...
Wim van den Heever / Sika deer (Cervus nippon) stag feeding in snow. Hokkaido, Japan, March.
Kirkendall-Spring / Snow covered trees, Amabilis Mountain, Mount Baker-Snoqualmie National Forest, Washington, USA. December 2015.
Matthew Maran / Avenue of trees in snow with benches, Kenwood Estate, Hampstead Heath, London, England, January 2013.
Ben Hall / Wren (Troglodytes troglodytes) on frost covered fern, Dunham Massey, Cheshire, UK. Winner of the Habitat Category of the British Wildlife Photographer of the Year Awards (BWPA) 2017.
Andres M. Dominguez / Portuguese oak tree leaf (Quercus faginea) and Blackberry leaf (Rubus fruticosa) leaf in ice, Sierra de Grazalema Natural Park, southern Spain, February.
Markus Varesvuo / Male Black grouse (Tetrao / Lyrurus tetrix) in snow, Utajarvi, Finland, May.
Wim van den Heever / Whooper swans (Cygnus cygnus) small flock coming into land on open field in snow storm, Hokkaido Japan.
Klein & Hubert / Domestic Tabby and white semi-longhaired cat (Felis silvestris catus) running in snow, France.
Klein & Hubert / Wirehaired Dachshund running in snow in French Alps, Haute-Savoie, France.
Brent Stephenson / Young Polar bear (Ursus maritimus) walking across melting sea ice, Scott Inlet, Baffin Island, Canadian Arctic, August. Vulnerable species.
Andy Rouse / Iceberg and mountain, Svalbard, Norway. Arctic. July.
Klein & Hubert / Siberian Husky sledge team running in snow, Vosges, France.
Andy Rouse / Polar Bear (Ursus maritimus) on pack ice, Svalbard, Arctic Norway. September.
Steven Kazlowski / Young Polar bear (Ursus maritimus) walking on newly formed pack ice, near Kaktovik, Barter Island, North Slope, Alaska, USA, October. Vulnerable species.
Pal Hermansen / The first structures of new ice, Norway
Bernard Castelein / Abstract ice pattern, Klein Schietveld, Brasschaat, Belgium, January
Wim van den Heever / Whooper swans (Cygnus cygnus) early evening in a snow storm, Lake Kussharo, Hokkaido, Japan. Taken with remote camera.
Marie Read / Red-winged Blackbird (Agelaius phoeniceus) male singing from ice-covered branch in early spring, Ithaca, New York, USA.
Cyril Ruoso / Glacier cave with icicles, Pastoruri Glacier 5200m above sea level, Cordillera Blanca, Andes, Peru
Wim van den Heever / Steller's sea-eagle (Haliaeetus pelagicus) landing on pack ice, Hokkaido, Japan, February.
Edwin Giesbers / Mute swan (Cygnus olor) flock on snow, Hazerswoude, The Netherlands, February.
Gerrit Vyn / White-tailed jackrabbit (Lepus townsendii) camouflaged in its winter coat. Sweetwater County, Wyoming, USA, January.
Ben Hall / Barn owl (Tyto alba) flying through heavy snowfall, Derbyshire, February.
Markus Varesvuo / Willow grouse / Ptarmigan (Lagopus lagopus) balancing on twigs feeding on buds, Inari Kiilopaa, Finland, January.
Markus Varesvuo / Willow grouse / Ptarmigan (Lagopus lagopus) walking through snow, Inari Kiilopaa, Finland, February.
Markus Varesvuo / Grey partridge (Perdis perdix) looking out of hole in snow, Liminka, Finland, February.
Graham Eaton / Partially frozen Gullfoss waterfall on the Hvita River, Southern Iceland, March 2015.
Solvin Zankl / Landscape of snow covered Oak trees (Quercus) woodland and fields, Germany. December,
Ann & Steve Toon / RF - Arctic fox vixen (Vulpes lagopus), captive, Highland Wildlife Park, Kingussie, Scottish Highlands, UK, December.
Wim van den Heever / Whooper swans (Cygnus cygnus) group of three, camouflaged on frozen lake, Kussharo, Hokkaido Japan.
Orsolya Haarberg / Snow covered Norway spruce (Picea abies) trees at the treeline, Stubba Nature Reserve, Laponia, Sweden, February 2013.
Andres M. Dominguez / Holm oak tree (Quercus ilex) in snowfall, Sierra de Grazalema Natural Park, southern Spain, January.
David Pattyn / Avalanche coming down a steep mountain side. Gran Paradiso National Park, Italy, November.
David Pattyn / Chamois (Rupicapra rupicapra) resting in deep snow.Gran Paradiso National Park, Italy, November.