Frederique Olivier / Killer whale (Orcinus orca) amongst thick pack ice, Antarctica. Taken on location for the BBC series, Frozen Planet.

Frederique Olivier / Weddell seal (Leptonychotes weddellii) pup on ice beside mother, Antarctica, Taken on location for the BBC series, Frozen Planet.

Guy Edwardes / 2020VISION / View south with willow trees over Walton Moor on the Somerset Levels from Walton Hill on a misty winter evening with snow on the ground, Somerset, UK, December 2010. Photographer quote: 'The temperatu...

Guy Edwardes / 2020VISION / Winter sunset over the Somerset Levels from Walton Hill on a misty evening with snow on the ground. View includes Butleigh Moor, Somerton Moor, Street Moor, Low Ham Moor, Walton Moor, Pitney Moor, Hui...

Radomir Jakubowski / Mountains and a freezing lake in Rondane National Park, Norway, September 2010. Winner, Fritz Polking Junior Award portfolio, GDT 2011 Competition.

Jeff Wilson / Adult Arctic wolf (Canis lupus) Ellesmere Island, Nunavut, Canada, June 2008. Taken on location for BBC series, Frozen Planet, Summer

Jeff Wilson / Arctic wolf (Canis lupus) on tundra, Ellesmere Island, Nunavut, Canada, June 2008. Taken on location for BBC series, Frozen Planet, Summer

Jeff Wilson / Royal Navy ship, HMS Endurance, crashing through the waves in the south atlantic ocean, Antarctica, November 2009. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / Pyramid of sea ice catching the first rays of the returning sun in the high Arctic, Svalbard, Spitsbergen, Norway, February 2009. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / Silhouette of Arctic wolf (Canis lupus) on sea ice, Ellesmere Island, Nunavut, Canada, June 2008. Taken on location for BBC series, Frozen Planet, Summer

Jeff Wilson / Pyramid of sea ice catching the first rays of the returning sun in the high Arctic, Svalbard, Spitsbergen, Norway, February 2009. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / Frozen Planet team tent at Lake Hoare Camp, Dry Valleys, Antarctica, December 2009. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / Royal Navy helicopter from HMS Endurance flying over sea and antarctic landscape, November 2008, Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / Pyramid of sea ice catching the first rays of the returning sun in the high Arctic, Svalbard, Spitsbergen, Norway, February 2009. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / View through the porthole of science teams and Frozen Planet film crew working on the sea ice in the Bering Sea, Alaska, USA, March 2008. The film crew were in search of Spectacled eider ducks, temper...

Jeff Wilson / Mountain landscape, Antarctica, November 2008. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / Emperor penguin (Aptenodytes forsteri) adults and chicks in colony beside ice cliff, Cape Crozier, Antarctica, November 2009. Taken on location for BBC series, Frozen Planet, Spring.

Jeff Wilson / Sun Dog, or Parhelion, caused by refraction of the sun's rays, more commonly seen in Antarctica, above glacier, Dry Valleys, Antarctica, December 2009. Taken on location for the BBC series, Frozen Pla...

Jeff Wilson / Emperor penguin (Aptenodytes forsteri) two adults in colony, Cape Crozier, Antarctica, November 2009. Taken on location for BBC series, Frozen Planet, Spring.

Jeff Wilson / Two Arctic wolves (Canis lupus) in tundra landscape, Ellesmere Island, Nunavut , Canada, June 2008, Taken on location for BBC series, Frozen Planet, Summer

Jeff Wilson / Crew member of the US coastguard ship 'Healy' standing on the sea ice in front of the ship's hull after the ship became stuck in the ice, Bering Sea, Alaska, USA, March 2008. Taken on location for the...

Jeff Wilson / Ventefact, a wind shaped rock, in the Dry Valleys, Antarctica, December 2009. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / Frozen planet team clothes and equipment ready for Antarctica expedition to Ross Sea, in National Science Foundation hanger, Christchurch, New Zealand, October 2009. Taken on location for BBC series,...

Jeff Wilson / Director, Chadden Hunter, standing on wind eroded rock talking on radio to base camp, Dry Valleys, Antarctica, December 2009. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / Aerial view of the River Onyx, the only running river in Antarctica, Dry Valleys, December 2009. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / Field Assistant, Jason Roberts, standing on top of rock pinnacle, Svalbard, Spitzbergen, Norway, July 2009, Taken on location for the BBC series, Frozen Planet.

Danny Green / Little Auks (Alle alle) flying low above surface in front of iceberg. Spitsbergen, Svalbard, Norway, July 2010. Highly commended in the Birds category in the GDT competition 2011.

Terry Whittaker / 2020VISION / Elderly woman feeding Grey herons (Ardea cinerea) with fish from supermarket on frozen River Tame, Reddish Vale Country Park, Stockport, Greater Manchester, UK, December 2010, Model released

Terry Whittaker / 2020VISION / Grey heron (Ardea cinerea) on frozen river, River Tame, Reddish Vale Country Park, Stockport, Greater Manchester, UK, with Northern Rail train on viaduct in the background, December 2010

Peter Cairns / 2020VISION / Three Mute Swans (Cygnus Olor) in flight over frozen Loch Insh, Cairngorms NP, Kincraig, Scotland, UK, January

Marie Read / Tree covered with rime ice standing in snow-covered field, aginst blue sky with clouds, Ithaca, New York, USA. January 2010.

Marie Read / Tree covered with rime ice standing in snow-covered field, Ithaca, New York, USA. January 2010.

Juergen Freund / A massive workforce of more than 300 women debone Milkfish (Chanos chanos) and pack them on ice. 60% for export market, mainly the Filipino communities living in North America and 40% consumed locall...

Edwin Giesbers / European Otter (Lutra lutra) walking across snow while sniffing the ground. The Netherlands, December. Captive.

Edwin Giesbers / Legs of a White Stork (Ciconia ciconia) on ice. The Netherlands, January.

Bruno D'Amicis / Sunset light on Mt. Zdiarska Vidla. Belianske Tatry, Slovakia, November 2007.

Inaki Relanzon / Aerial view of the Myrdalsjokull Glacier, in South Iceland, April 2010

Fergus Gill / Bullfinch (Pyrrhula pyrrhula) male feeding on berries in a frozen rowan tree in winter. Perthshire, Scotland, December

Fergus Gill / Goldfinch (Carduelis carduelis) feeding on frozen Teasels. Perthshire, Scotland, Dec

Orsolya Haarberg / Winter landscape with snow-covered trees in forest, Riisitunturi National Park, Lapland, Finland, February 2007

Orsolya Haarberg / Winter landscape fog-bow and snow-covered trees in forest, Riisitunturi National Park, Lapland, Finland, February 2007

Orsolya Haarberg / Spruce trees covered in hard frost, coniferous forest in winter, Harghita, Romania.

Orsolya Haarberg / Spotted redshank (Tringa erythropus) at shallow water in snow, Ovre-Pasvik National Park, Norway

Orsolya Haarberg / Snow covered landscape with Vik church in the background, the large stones in the foreground have been covered with volcanic ash from the Eyafjallajokull volcano, Iceland, April 2010

Juan Carlos Munoz / Vatnajokull glacier, Southeast Iceland,

Juan Carlos Munoz / Vatnajokull glacier. Southeast Iceland, July 2009

Kevin Schafer / Face of Monaco Glacier, Leifdefjorden, Svalbard, Norway 2010

Kevin Schafer / Kittiwake (Rissa tridactyla) flock feeding in from of the Monaco Glacier, Leifdefjord, Svalbard, Norway 2010

Kevin Schafer / Ice detail, Monaco Glacier, Leifdefjorden, Svalbard, Norway 2010

Kevin Schafer / Fogbow over pack ice, Svalbard, Arctic Norway 2010

Kevin Schafer / Edge of the Monaco Glacier, Leifdefjorden, Svalbard, Norway 2010

Bryan and Cherry Alexander / Ice-fishing huts on Mille Laks Lake. Minnesota, USA, 1985.

Oriol Alamany / Laguna Torre and Grande glacier below Cerro Torre (3102 m), Los Glaciares National Park, Andes, Patagonia, Argentina, January 2006

Oriol Alamany / Peak and glaciers at Paine Grande (3050 m), Torres del Paine National Park, Patagonia, Chile, January 2006

Andrew Parkinson / Mute swan (Cygnus olor) walking across frozen lake during a blizzard. Derbyshire, UK, January (non-ex)

Andrew Parkinson / Mute swan (Cygnus olor) walking across a frozen lake during a blizzard. Derbyshire, UK, January (non-ex)

Mike Potts / Mendenhall Glacier in severe retreat, with blue ice indicating where the glacier has recently calved. Juneau Alaska USA, May 2010

Andrew Parkinson / Coot (Fulica atra) portrait, revealing the size of its enormous feet as it crosses a frozen lake. Derbyshire, UK, January (non-ex) Highly commended in the Portfolio category of the BWPA Competition 20...

Andrew Parkinson / Mallard (Anas platyrhynchos) male standing on a frozen lake during a snowfall, Derbyshire, UK. (non-ex)

Andrew Parkinson / Magpie (Pica pica) hopping along over snow covered ground. Derbyshire, UK, November (non-ex)

Floris van Breugel / A colorful explosion of rocks embedded in three feet of permanent cave ice deep in a lava tube cave (illuminated with a flashlight in the utter darkness.) Lava Beds National Monument, Northern Califor...

Bryan and Cherry Alexander / Icebergs frozen in frazil ice (ice crystals) at beginning of winter. Northwest Greenland, 1991.

Eric Baccega / View across the bow of the Lyubov Orlova ship, moving through pack ice at dawn, off the coast of Devon Island. Nunavut, Canada, August 2010

Eric Baccega / Iceberg in Davis Strait off south Baffin island, Nunavut, Canada, August 2010

Eric Baccega / Icebergs and glacier, Croker Bay, Devon Island, Nunavut, Canada, August 2010

Eric Baccega / Polar bear (Ursus maritimus) female and her two cubs on large iceberg off Baffin Island. Nunavut, Canada, August 2010

Steven Kazlowski / Polar bears (Ursus maritimus) female with cubs aged two years travelling along a barrier island during autumn freeze up, Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Photographers photographing of a group of curious Polar bears (Ursus maritimus) from motorboats along a barrier island during autumn freeze up, Barter Island, 1002 area of the Arctic National Wildlife...

Steven Kazlowski / Polar bear (Ursus maritimus) young male playing / rolling around in the snow along a barrier island during autumn freeze up, Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) portrait of curious young male, covered in snow from rolling around / playing. On a barrier island during autumn freeze up, Bernard Spit, 1002 area of the Arctic National...

Guy Edwardes / Fjallsarlon glacial lake, edge of Vatnajokull glacier with reflections, Vatnajokull NP, Iceland, June 2009

Steven Kazlowski / Polar bear (Ursus maritimus) footprints in the snow along a barrier island during autumn freeze up, Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, Alaska. October 2009

Steven Kazlowski / Polar bear (Ursus maritimus) portrait of a juvenile male playing in the slushy freezing water, Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, Alaska.

Steve Gettle / Dark-eyed Junco (Junco hyemalis) on branch with frozen berries, North America

Nick Upton / 2020VISION / Common / Eurasian cranes (Grus grus) small flock of juveniles taking flight over the frozen, snow covered pastureland on a foggy winter morning. These Cranes were released by the Great Crane Project...

Nick Upton / Mute swans (Cygnus olor) flying past flock of Common / Eurasian juvenile cranes (Grus grus) released by the Great Crane Project onto the Somerset Levels and Moors, foraging on frozen pastureland on a...

Graham Eaton / Underneath the ice of Llyn Dinas lake, Snowdonia NP, Wales, December

Graham Eaton / Underneath the ice of Llyn Dinas lake, Snowdonia NP, Wales, December. Commended image in the LANDSCAPE PHOTOGRAPHER OF THE YEAR awards competition 2011

Doug Allan / Snow petrel {Pagodroma nivea} flying over snowy landscape, Antarctica

Michel Roggo / Chubb (Leuciscus cephalus) under ice in frozen river, Aare river, Switzerland 2006

Nick Garbutt / Arctic tern (Sterna Paradisaea) hovering in flight over an iceberg.Peterman Island, Antarctic Peninsula, Antarctica. February.

Nick Garbutt / Flock of Kelp / Southern black backed Gulls (Larus dominicanus) flying over iceberg. Graham Passage, Antarctic Peninsula, Antarctica. February. (digitally altered image)

David Noton / Athabasca River with Dragon Peak and the Winston Churchill Range at dawn, Jasper National Park, Alberta, Canada. September 2009

David Noton / Athabasca River with Dragon Peak and the Winston Churchill Range at dawn, Jasper National Park, Alberta, Canada. September 2009

David Noton / The Athabasca River with Mt Fryatt and Brussels Peak at dawn, Jasper National Park, Alberta, Canada. September 2009

Tim Laman / Iceberg showing wave erosion, Antarctica, January

Edwin Giesbers / Air bubbles trapped in ice, the Netherlands

Edwin Giesbers / Detail in ice pattern formations, the Netherlands,

Edwin Giesbers / Ice patterns, with leaves frozen beneath the surface, the Netherlands

Neil Lucas / Sundog / Parhelion (circle of light around the sun) with large ice fumerole in the foreground, McMurdo Sound, Ross Sea, Antarctica, November 2008

Neil Lucas / Glacier rising up out of sea ice with ice crack visible, Ross Sea, Antarctica, November 2008

Neil Lucas / Camerman Doug Allan at frozen water surface of drilled ice hole, BBC film crew, McMurdo Sound, Ross Sea, Antarctica, November 2008

Neil Lucas / Glacier and sea ice, with crack in ice visible, McMurdo Sound, Ross Sea, Antarctica, November 2008

Jerry Monkman / Two young brothers ice fishing on the West River in Brattleboro, Vermont, USA, February 2007. Model released.

Thomas Lazar / Ice hanging from arch in sea cave carved in soft sandstone cliffs, frozen lake, Squaw Bay, Lake Superior, Apostle Islands National Lakeshore, Wisconsin, USA, February 2009

Uri Golman / Aerial view of Meltwater lake, Greenland. August 2008.