Andy Rouse / Polar Bear (Ursus maritimus) portrait in sea-ice landscape. Wide angle / fish-eye shot. Svalbard, Norway, September.

Pal Hermansen / RF - Double exposure shot of sheet of ice on Greenland Sea with snow covered mountains in background. Krossfjorden, Svalbard, Norway. April 2018. (This image may be licensed either as rights managed o...

Danny Green / North American river otter (Lontra canadensis) female and cub walking across snow, reflected in water. Yellowstone National Park, USA, January.

Danny Green / Bald eagle (Haliaeetus leucocephalus), two perched on rocks in front of frozen waterfall. Alaska, USA, February.

Erlend Haarberg / Common reeds (Phragmites australis) on a frozen lake, Sel, Norway, March.

Guy Edwardes / Red-crowned crane (Grus japonensis) courtship dance in snow, Hokkaido, Japan

Guy Edwardes / Dalmatian pelicans (Pelecanus crispus) on ice, Lake Kerkini, Greece

Doug Gimesy / Tim Flannery in summer clothing, reading his best-selling book 'The Weather Makers' on an icy pebble beach, Robert Point, Antarctic Peninsula, Antarctica, to illustrate the warming of the Anta...

Danny Green / Polar bear (Ursus maritimus) resting on sea ice, view from above. Svalbard, Norway, June 2018.

Danny Green / Polar bear (Ursus maritimus) and cubs, standing on sea ice. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) and cubs resting on sea ice. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) female and cubs, one cub walking up slope of ice in foreground. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) and cubs feeding on Whale carcass, on iceberg. Svalbard, Norway, July 2018.

Danny Green / Polar bear (Ursus maritimus) standing on glacier. Svalbard, Norway, July 2018.

Danny Green / Polar bear (Ursus maritimus) standing on ice. Svalbard, Norway, July.

Danny Green / Polar bear (Ursus maritimus) looking for food on ice. Svalbard, Norway, April.

Danny Green / Polar bear (Ursus maritimus) male standing beside rocks in frozen and snow covered landscape. Svalbard, Norway, April 2019.

Danny Green / Polar bear (Ursus maritimus) male walking across frozen landscape. Svalbard, Norway, April 2019.

Danny Green / Polar bear (Ursus maritimus), male and female approaching each other across snow covered rocky landscape. Svalbard, Norway, April 2019.

Danny Green / RF - Polar bear (Ursus maritimus) female walking across ice. Svalbard, Norway, April. (This image may be licensed either as rights managed or royalty free.)

Ingo Arndt / Sun rising over ice formations on Lake Baikal. Siberia, Russia. February 2019.

Nick Hawkins / Underneath view of a North American beaver (Castor canadensis) swimming under the ice of a frozen river. Quebec, Canada. October.

Oscar Dewhurst / Red fox (Vulpes vulpes) sitting on a frozen lake at the edge of the reeds. London, UK. December.

Stefan Christmann / Moon rising over sea ice during polar night. Atka Bay, Antarctica. June 2017.

Stefan Christmann / Cameraman Lindsay McCrae on sea ice filming frozen landscape and icebergfor BBC Dynasties Penguin programme. Atka Bay, Antarctica. October 2017.

Pal Hermansen / Cracked frozen lake following the first snow of winter, aerial view. Akershus, Norway. December 2018.

Sven Zacek / Frozen bog pool system, aerial view. Endla Nature Reserve, Jogevamaa, Central Estonia. December 2016.

Sven Zacek / Eurasian beaver (Castor fiber) on ice besides reeds in Emajogi River, Tartumaa, Southern Estonia. January.

Sven Zacek / Honey bee (Apis mellifera), two frozen on pond ice after flying out too early. Valgamaa, Southern Estonia. March.

Franco Banfi / Diver exploring around an iceberg. Tasiilaq, East Greenland. April 2018.

Franco Banfi / Diver exploring an iceberg in Greenland Sea. Tasiilaq, East Greenland. April 2018.

Franco Banfi / Sugar kelp (Saccharina latissima) and Sea anemones (Actiniaria) on rock near iceberg. Tasiilaq, East Greenland. April.

Franco Banfi / Sugar kelp (Saccharina latissima) near iceberg, view upwards to gap in sea ice. Tasiilaq, East Greenland. April.

Bernard Castelein / Frozen water patterns in Klein Schietveld, Brasschaat, Belgium

Andres M. Dominguez / Blue butterfly (Lycaenidae) frozen in ice, Cortes de la Frontera, Los Alcornocales Natural Park. Spain. Highly commended in the Other animals category of the GDT European Wildlife Photographer of th...

Guy Edwardes / Rannoch Moor and The Black Mount in winter, Highlands, Scotland, UK. January 2015.

Ashley Cooper / Needle ice on Holly leaves (Ilex europaeus) in a woodland in Ambleside Cumbria UK. December 2008

Cyril Ruoso / Golden monkey (Rhinopithecus roxellana) jumping over a frozen stream, Qinling Mountains, China. Sequence 2 of 7

Andres M. Dominguez / Frozen Elmleaf blackberry (Rubus ulmifolius) in a small pond, Sierra de Grazalema Natural Park, southern Spain, January.

Andres M. Dominguez / Leaf frozen in ice, Sierra de Grazalema Natural Park, southern Spain, February. Highly Commended in the Plants and Fungi Category of the Asferico 2016 Awards.

Andres M. Dominguez / Dove's-foot crane's-bill leaf (Geranium molle) and algae in ice with air bubbles, Sierra de Grazalema Natural Park, southern Spain, February.

Andres M. Dominguez / Ice and grass in frozen pond, Sierra de Grazalema Natural Park, southern Spain, January.

Wim van den Heever / Whooper swan (Cygnus cygnus) mid flight over the frozen lake, Kussharo, Hokkaido, Japan.

Wim van den Heever / Whooper swan (Cygnus cygnus) portrait, on frozen lake Kussharo, Hokkaido Japan, February.

Wim van den Heever / Whooper swans (Cygnus cygnus) juvenile with adults behind, on frozen Lake Kussharo, Hokkaido, Japan. February.