Paul Hobson / Small garden bumble bee (Bombus hortorum) frozen on small twig, covered in ice crystals, Sheffield, UK February 2011

Mark Taylor / Perito Moreno Glacier, panoramic view, Argentina, January 2010

Fergus Gill / 2020VISION / Tree Sparrow (Passer montanus) Perching on a snow covered branch. Perthshire, Scotland.

Juan Carlos Munoz / Ice on lake, Plitvice Lakes National Park, Lika, Croatia, Europe, January

Juan Carlos Munoz / Ice on water, Plitvice Lakes National Park, Lika, Croatia, Europe, January

Chadden Hunter / Brinicles (brine icicles or ice stalactites) forming under the ice, growing towards the sea floor, Ross Sea, McMurdo Sound, Antarctica. Taken on location for 'Winter' episode of the BBC Frozen Planet...

Orsolya Haarberg / Stones frozen in ice, Helgeland, Norway, January

Mark Hamblin / 2020VISION / Stac Pollaidh at dawn with Loch Lurgainn in foreground, Coigach, Wester Ross, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Stac Pollaidh at dawn, with frozen Loch Lurgainn in foreground, Coigach, Wester Ross, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / European river otter (Lutra lutra) footprints crossing frozen Loch Lurgainn at dawn, with Sgorr Tuath and Sgorr Deas (Beinn an Eoin) behind, Coigach, Wester Ross, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / European river otter (Lutra lutra) footprints crossing frozen Loch Lurgainn at dawn, with Sgorr Tuath & Sgorr Deas (Beinn an Eoin) behind, Coigach, Wester Ross, Scotland, UK, December 2010

Peter Cairns / 2020VISION / Ice on mudflats, Morecambe Bay, Silverdale, Cumbria, England, UK, February

Roy Mangersnes / Mist above Monaco Glacier, North west of Spitsbergen, Svalbard, Norway, August

Roy Mangersnes / Juvenile Black-legged kittiwake (Rissa tridactyla) flying over Raudfjorden, North-western tip of Spitsbergen, Svalbard, Norway, September

Laurie Campbell / Highland bull (Bos taurus) face close up in freezing fog, Berwickshire Scotland, December

Graham Eaton / View of frozen Llynnau Mymbyr, a mountain lake, with fog partly revealing a mountain ridge, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / Underwater view of a mountain lake with frozen surface, Llyn Idwal, Snowdonia NP, Gwynedd, Wales, UK, December

Brent Stephenson / A large hole in an iceberg with icicles hanging. Yalour Islands, Antarctic Peninsula, Antarctica, December.

Mark Hamblin / 2020VISION / Two Blue tit (Parus caeruleus) adults in winter, perched on twig with frozen crab apples, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Adult Robin (Erithacus rubecula) in winter, perched on twig with frozen crab apples, Scotland, UK, December 2010. Did you know? The association of Robins with Christmas came from the postmen, known as...

Mark Hamblin / 2020VISION / Female Blackbird (Turdus merula) perched in crab apple tree in winter, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Adult Robin (Erithacus rubecula) and adult Blue tit (Parus caeruleus) in winter, perched on twig with frozen crab apples, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Partially frozen River Spey in winter, Cairngorms NP, Scotland, UK, December 2012

Mark Hamblin / 2020VISION / European river otter (Lutra lutra) footprints in snow on the edge of the frozen River Spey, at sunset, Cairngorms NP, Scotland, UK, December 2010

Mark Hamblin / 2020VISION / Partially frozen River Spey in winter, Cairngorms NP, Scotland, UK, December 2012

Chadden Hunter / Entering the ice caves of Mount Erebus, Antarctica. Taken on location for BBC Frozen Planet series, 2009

Chadden Hunter / Cameraman Jeff Turner and Producer Chadden Hunter exposed at -40 degrees in Arctic circle in Northern Canada while filming wolves and bison hunting sequence. Taken on location for BBC Frozen Planet se...

Chadden Hunter / King penguin (Aptenodytes patagonicus) chick creche enduring harsh weather, South Georgia. Taken on location for BBC Frozen Planet series, 2008

Doug Allan / Killer Whales (Orcinus orca) spy-hopping to observe Weddell Seal (Leptonychotes weddellii) in preparation to knock it from the ice by creating a wave. Marguerite Bay, Antarctic Peninsula, summer. Free...

Oriol Alamany / Grey glacier over Grey lake, Torres del Paine National Park, Patagonia, Chile

Sven Zacek / Frozen bubbles captured in ice on the surface of lake. South Estonia, Europe, January 2008.

Peter Cairns / 2020VISION / Group of Mute swans (Cygnus olor) on a partially frozen loch, Loch Laggan, Creag Meagaidh NNR, Scotland, UK, December 2010

Andy Rouse / Polar Bear (Ursus maritimus) sleeping on pack ice. Wide angle / fish-eye shot. Svalbard, Norway, September.

Ole Jorgen Liodden / Glaucous Gull (Larus hyperboreus) on blue ice. Spitsbergen, Svalbard, July.

Ole Jorgen Liodden / Glacier and mountain peaks. Spitsbergen, Svalbard, September.

Kathryn Jeffs / Cliff at edge of tabular iceberg, Antarctica, February 2009, Taken on location for BBC Frozen Planet series

Kathryn Jeffs / Iceberg off the Antarctic Peninsula, Antarctica, February 2009, Taken on location for BBC Frozen Planet series

Kathryn Jeffs / Icebergs off the Antarctic Peninsula, Antarctica, February 2009, Taken on location for BBC Frozen Planet series

Kathryn Jeffs / Floe ice off the Antarctic peninsula at dawn, Antarctica, January 2009, Taken on location for BBC Frozen Planet series

Kathryn Jeffs / The 'Golden Fleece' (base ship for BBC film crew) passing up the coast of the Antarctic Peninsula, Antarctica, January 2009, Taken on location for BBC Frozen Planet series

Andrew Parkinson / Yellowhammer (Emberiza citrinella) perched on frost covered branches, Dumfries and Galloway, Scotland, UK, December.

Andrew Parkinson / Mute swan (Cygnus olor) drinking from the surface of a frozen lake, Derbyshire, UK, March.

Nick Upton / 2020VISION / Juvenile Common / Eurasian cranes (Grus grus) released by the Great Crane Project onto the Somerset Levels and Moors, on frozen snow covered pastureland. Somerset, UK, December 2010.

Graham Eaton / Ice on lake surface seen from below. Llyn Idwal, Snowdonia, Wales, December 2010.

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 / 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 / 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 / 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 / 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 / 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,...

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.

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.

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

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

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

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...

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 / 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) 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

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

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)

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,

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