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

John Chan / Honey bee (Apis mellifera) gathering pollen from a Sea fig (Carpobrotus chilensis), Southern California, USA, April.

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

Pal Hermansen / Aerial shot of patterns in a frozen lake, Lake Langen, Akershus, Norway, December 2017.

Jussi Murtosaari / European Dipper (Cinclus cinclus) on ice next to stream, winter, Finland. February.

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

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

Orsolya Haarberg / Snow covered Norway spruce (Picea abies) trees at the treeline, Stubba Nature Reserve, Laponia, Sweden, February 2013.

Sven Zacek / Sunrise over a frozen bog pool, Tartumaa, Estonia, November 2014.

Loic Poidevin / Common teasel (Dipascus fullonum) seed-heads covered in ice, Vendee, France , January

Staffan Widstrand / Arctic fox (Vulpes lagopus) in winter coat, resting in grass, Spitsbergen, Svalbard, Norway, September.

Markus Varesvuo / Willow grouse (Lagopus lagopus) Kiilopaa, Inari, Finland, January.

Floris van Breugel / Black-billed shrike-tyrant (Agriornis montanus) perched in snowy tree with Mount Fitz Roy visible beyond. Patagonia, Argentina, June 2014. Awarded in Land category, Wildlife Photographer of the Year 2...

Hougaard Malan / Perito Moreno glacier viewed over bright autumn foliage, Patagonia, Argentina. April 2013. Non-ex.

Andy Trowbridge / Arctic Fox cub (Alopex / Vulpes lagopus) standing in fresh snow, blue morph. Dovrefjell National Park, Norway, September.

Jussi Murtosaari / Mute Swans (Cygnus olor) foraging, southwest Finland, February.

Sven Zacek / Frozen leaf in lake ice. Southern Estonia, April.

Sven Zacek,Sven Zacek / Fresh snow and ice on Baltic Sea coast. The red colour comes from seaweed beneath the ice. Baltic sea coast, Northern Estonia, December 2012.

Sven Zacek,Sven Zacek / Blue light after sunset at the Peipsi Lake, the largest lake in Estonia. August 2007.

Andy Sands / Comma butterfly (Polygonia c-album) feeding on flower of Ice plant (Sedum) in garden, Hertfordshire, UK, September

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

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

Wild Wonders of Europe / Relanzón / Ice plant (Mesembryanthemum crystallinum) flower, North Lanzarote, Canary Islands, Spain, March 2009

Tim Fitzharris / Ice Plant (Carpobrotus edulis), Big Sur coast near Bixby Creek, California

Bernard Castelein / Frozen pond with encroaching trees and tussocks. Peerdsbos, Brasschaat, Belgium. January.

Ann & Steve Toon / Ice plant (Drosanthemum hispidum) Namaqua National Park, Northern Cape, South Africa.

John Shaw / Dwarf willow (Salix herbacea) growing beside a small glacial stream with icebergs in Hare Fjord, Scoresby Sund, Greenland, August.

Claudio Contreras / Jeffrey pine (Pinus jeffreyi) needles on ice. Sierra de San Pedro Martir National Park, Baja California Peninsula, Mexico.

Heather Angel / Bamboo encased by icicles formed beside a waterfall. Wolong, Sichuan Province, China. February.

Ernie Janes / Siberian bugloss (Brunnera macrophylla) 'Blue ice', cultivated plant.

Sven Zacek / Frozen bog pools and bog turf at dawn. Alam-Pedja Nature Reserve, Tartumaa, Southern Estonia. November 2018.

Sven Zacek / Sunset reflected in a bog pool covered with first ice of winter. Tartumaa, Southern Estonia. December 2015.

Sven Zacek / First ice on bog pool with trees reflected in water. Jogevamaa, Central Estonia. October 2015.

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

Sven Zacek / Hiking trail with boardwalk and viewing platform over frozen bog pools, aerial view. Endla Nature Reserve, Jogevamaa, Central Estonia. December 2016.

Sven Zacek / Flooded and frozen Halliste River. Soomaa National Park, Parnumaa, Western Estonia. December 2017.

Franco Banfi / Arctic comb jelly / Sea nut (Mertensia ovum) swimming in front of iceberg. Tasiilaq, East Greenland. April.

Pal Hermansen / Lake and surrounding trees in first snow of winter, aerial view. Akershus, Norway. December 2018.

David Tipling / Ice covered dyke on Cley NWT reserve covered in snow, Cley North Norfolk, England, UK. February

Chris Mattison / Cheiridopsis robustus, a leaf succulent from the Knersvlakte region, Namaqualand, South Africa

Chris Mattison / Cheiridopsis robustus, closed seed capsule. Namaqualand, South Africa.

Chris Mattison / Seedling cone plants (Conophytum subfenestratum), approximately two months after sowing. Focus-stacked image.

Chris Mattison / Seedling cone plants (Conophytum subfenestratum), approximately two months after sowing. Focus-stacked image.

Chris Mattison / Cheiridopsis species, seed capsule open in response to rain. Namaqualand, South Africa.

Chris Mattison / Cheiridopsis species, seed capsule open in response to rain. Namaqualand, South Africa.

Chris Mattison / Living stone plant (Lithops dorotheae) one of the 'living stones' plants, in cultivation. It is in transitional stage, with the old leaves withering and new ones emerging. Native to South Afri...

Guy Edwardes / Riisitunturi in winter with Aurora Borealis, Kuusamo, Lapland, Finland. January 2016

Guy Edwardes / Trees bent in snow, Riisitunturi in winter, Kuusamo, Lapland, Finland. January 2016

David Allemand / Arctic fox (Alopex lagopus) running in autumn landscape, Iceland. October.

John Chan / Honey bee (Apis mellifera) gathering pollen from a Sea fig (Carpobrotus chilensis), Southern California, USA, April.

Ashley Cooper / Hoar frost on Beech leaves (Fagus sylvatica) Rydal, Lake District, England, UK. December 2010.

Ashley Cooper / AlgaeLink, an algae growing system used to produce ethanol and biodiesel oil from algae. This is more efficient than from growing traditional plant oil crops as it does not take as much space. Chamoni...

Ashley Cooper / AlgaeLink, an algae growing system used to produce ethanol and biodiesel oil from algae. This is more efficient than from growing traditional plant oil crops as it does not take as much space. Chamoni...

Ashley Cooper / AlgaeLink, an algae growing system used to produce ethanol and biodiesel oil from algae. This is more efficient than from growing traditional plant oil crops as it does not take as much space. Chamoni...

Ashley Cooper / AlgaeLink, an algae growing system used to produce ethanol and biodiesel oil from algae. This is more efficient than from growing traditional plant oil crops as it does not take as much space. Chamoni...

Ashley Cooper / AlgaeLink, an algae growing system used to produce ethanol and biodiesel oil from algae. This is more efficient than from growing traditional plant oil crops as it does not take as much space. Chamoni...

Ashley Cooper / Oil fired power plant in Illulisat, Greenland, July 2008.

Tony Heald / Antarctic fur seal (Arctocephalus gazella) resting on tussock grass, scratching nose. King penguin (Aptenodytes patagonicus) colony in background. Gold Habour, South Georgia. October 2017.

Guy Edwardes / Beech (Fagus sylvatica) woodland with hoar frost, West Woods, Compton Abbas, Dorset, England, UK. December.

Steve Downer / Timelapse of ice crystals melting on a leaf, Clowes Wood, Solihull, West Midlands, England, UK, November.

Jiri Lochman / Jewel beetle (Julodis viridipes) in Ice plant (Aizoaceae) flower, South Africa.

Andres M. Dominguez / Frozen leaves of European pear (Pyrus communis) in ice. Sierra de Grazalema Natural Park, southern Spain, December.

Matthew Maran / Hottentot fig (Carpobrotus edulis). This originates in South Africa but is a known invasive having escaped from gardens, and impacts on coastal vegetation and cliffs. Devon, England, UK, November.

Emanuele Biggi / Ice plant (Mesembrianthemum crystallinum) Swakopmund, Namibia

Nick Upton / Sea Purslane / Shoreline purslane (Sesuvium portulacastrum) flowering on the sandy shore of a coastal lagoon, Sotavento, Fuerteventura, Canary Islands, May.

Chris Mattison / Endemic succulent (Oophytum nanum) in bud, growing among quartz pebbles in the Knersvlakte, Western Cape, South Africa.

Chris Mattison / Endemic Stone plant (Argyroderma delaetii) with one new and one old seedpod, growing among quartz pebbles in the Knersvlakte, Western Cape, South Africa

Chris Mattison / Endemic Stone plant (Argyroderma delaetii) also known as Bababoudjes (Babies' bottoms), growing among quartz pebbles in the Knersvlakte, Western Cape, South Africa

Chris Mattison / Endemic succulents Oophytum nanum and Argyroderma delaetii growing among quartz pebbles in the Knersvlakte, Western Cape, South Africa, where they are endemic

Chris Mattison / Succulent Argyroderma fissum, growing among quartz pebbles in the Knersvlakte, Western Cape, South Africa

Chris Mattison / Vingervygie (Argyroderma fissum), Knersvlakte region, Namaqualand, South Africa

Chris Mattison / Conophytum concavum, a stone-mimicking succulent endemic to the Knersvlakte region, Namaqualand, South Africa

Chris Mattison / Succulent (Cheiridopsis species), Knersvlakte region, Namaqualand, South Africa

Chris Mattison / Endemic Stone plant (Argyroderma delaetii), also known as Bababoudjes (Babies' bottoms), growing among quartz pebbles in the Knersvlakte, Western Cape, South Africa

Ernie Janes / Ice plant (Sedum telephium) 'Purple Emperor' in flower in garden.

Michel Roggo / Forest on shore of Temnik river, in spring with Siberian Rhododendron (Rhododendron dauricum) and Birch (Betula sp.) Temnik River, Baikal Nature Reserve, Buryatia, Siberia, Russia, May 2015.

Michel Roggo / Split level view of meltwater in icefield on the Temnik River With Willows (Salix sp.) Temnik River, Baikal Nature Reserve, Buryatia, Siberia, Russia, May 2015.

Michel Roggo / Underwater view of meltwater of in icefield on the Temnik River With Willows (Salix sp.) Temnik River, Baikal Nature Reserve, Buryatia, Siberia, Russia, May 2015.

Michel Roggo / Underwater view of meltwater of in icefield on the Temnik River With Willows (Salix sp.) Temnik River, Baikal Nature Reserve, Buryatia, Siberia, Russia, May 2015.

Michel Roggo / Underwater view of meltwater in icefield on the Temnik River With Willows (Salix sp.) Temnik River, Baikal Nature Reserve, Buryatia, Siberia, Russia, May 2015.

Michel Roggo / Split level view of meltwater in icefield on the Temnik River With Willows (Salix sp.) Temnik River, Baikal Nature Reserve, Buryatia, Siberia, Russia, May 2015.

Michel Roggo / Split level view of meltwater in icefield on the Temnik River With Willows (Salix sp.) Temnik River, Baikal Nature Reserve, Buryatia, Siberia, Russia, May 2015.

Michel Roggo / Underwater view of meltwater in icefield on the Temnik River With Willows (Salix sp.) Temnik River, Baikal Nature Reserve, Buryatia, Siberia, Russia, May 2015.

Michel Roggo / Underwater view of meltwater in icefield on the Temnik River With Willows (Salix sp.) Temnik River, Baikal Nature Reserve, Buryatia, Siberia, Russia, May 2015.

Michel Roggo / Underwater view of meltwater of icefield on the Temnik River with Willows (Salix sp.) The Temnik river enters the Selenga River, Siberia, Russia.

Michel Roggo / Meltwater in icefield on the Temnik River With Willows (Salix sp.) Temnik River, Baikal Nature Reserve, Buryatia, Siberia, Russia, May 2015.

Michel Roggo / Motelon creek frozen in winter, Jogne river tributary, Saane river tributary, Gruyere, Fribourg, Switzerland, February 2012. Photographed for the Freshwater Project.

Ernie Janes / Peacock butterflies (Inachis io) resting on Ice plant (Sedum spectabile) England, UK.

John Waters / Panning shot of Brambles (Rubus fruticosus) covered in frost, Catcott, Somerset Levels, England, UK, January.

Sue Daly / Hottentot fig (Carpobrotus edulis) Alderney, British Channel Islands, May.

Sue Daly / Hottentot fig (Carpobrotus edulis) Alderney, British Channel Islands, May.

Orsolya Haarberg / Pale green river in the Lofoten Islands. The weather turned mild and melting water quickly filled the riverbeds that were still covered by icehence the light color of the water. Lofoten Islands, Norwa...

Philippe Clement / Alpine pasqueflower (Pulsatilla alpina) in flower, with a glacier in the background. Val Veny, Graian Alps, Italy, June.