John Cancalosi / Axolotl / Mexican salamander (Ambystoma mexicanum), white or leucistic form, critically endangered in the wild, captive, native to Mexico

Michele Westmorland / Snorkeler swimming with harmless Jellyfish (Mastigias papua etpisonii), Jellyfish Lake, Rock Islands, Palau, Micronesia.

George Sanker / Ellis River high in White Mountain National Forest. New Hampshire, October 2012.

Gavin Hellier / Women in colourful Saris collecting water, across the Jumna (Yamuna) river from Taj Mahal, UNESCO World Heritage Site, Agra, Uttar Pradesh, India, 2011, model released

Gavin Hellier / Elevated view over the Bosphorus and Sultanahmet from the Galata Tower in Istanbul, Turkey 2008

Gavin Hellier / New Pudong skyline, looking across the Huangpu River from the Bund, Shanghai, China 2010. No release available.

Gavin Hellier / Shanghai night skyline, the view along Huangpu River and the Bund, Shanghai, China 2010. No release available.

Gavin Hellier / Looking down on St. Vitus Cathedral, Charles Bridge, UNESCO World Heritage Site, and the Castle District illuminated at night, Prague, Czech Republic 2011. No release available.

Gavin Hellier / Looking down on St. Vitus Cathedral, Charles Bridge, UNESCO World Heritage Site, and the Castle District, Prague, Czech Republic 2011. No release available.

Gavin Hellier / Elevated view of mid-town Manhattan, New York City, USA 2009. No release available.

Gavin Hellier / Cloud formation and wooden jetty at Barrow Bay landing, Derwent Water, Lake District National Park, Cumbria, UK November 2008

Gavin Hellier / Wenkchemna Peaks or Ten Peaks rising over Moraine lake in the snow, near Lake Louise, Banff National Park, Alberta, Canada, 2007

Gavin Hellier / Peyto Lake, coloured by glacial silt, Banff-Jasper National Parks, Alberta, Canada, 2007

Gavin Hellier / Bridge spanning Lake Jablanicko near Sarajevo, Bosnia and Herzegovina, Balkans 2007

Gavin Hellier / Luxury cruise liner infront of Midtown Manhattan across the Hudson River, New York, USA October 2011. No release available.

Juan Carlos Munoz / Detail in frozen waterfall. Selijalandfoss waterfall, Southern Iceland, Europe, March 2011.

David Pattyn / Three Dalmatian Pelicans (Pelecanus crispus) portrait on lake. Lake Kerkini, Greece, March 2012.

Jeff Vanuga / Aerial view of Grand Prismatic Springs Midway Geyser Basin. Yellowstone National Park, Wyoming, July 2011.

Richard Steel / 2020VISION / Dipper (Cinclus cinclus) standing in stream, Clwyd, Wales, UK, February.

Richard Steel / 2020VISION / Female Goosander (Mergus merganser) drying feathers, Gwynedd, Wales, UK, January.

Richard Steel / 2020VISION / Male Goosander (Mergus merganser) flying over water, Gwynedd, Wales, UK, February.

Fergus Gill / 2020VISION / Female Eider (Somateria mollissima) swimming on sea, Outer Hebrides, Scotland, UK, June.

Fergus Gill / 2020VISION / Male Goldeneye (Bucephala clangula), Hogganfield Loch, Glasgow, Scotland, UK, February. Did you know? Goldeneyes forest ducks, which nest in trees.

Niall Benvie / Waterfalls in woodland. Craigengillan Estate, Dalmellington, Ayrshire, October.

Ernie Janes / Mute Swan (Cygnus olor) against dark water, Felbrigg, Norfolk, November

Mark Hamblin / 2020VISION / View through window of birdwatching hide, Woodwalton Fen National Nature Reserve, Cambridgeshire, England, UK, July 2012.

Peter Cairns / 2020VISION / River Affric flowing through a rocky gorge, Glen Affric National Nature Reserve, Scotland, UK, October 2012.

Peter Cairns / 2020VISION / View over the River Spey at sunrise, Cairngorms National Park, Scotland, UK, May.

Peter Cairns / 2020VISION / Osprey (Pandion haliaetus) perched on branch, holding stick in its foot, Cairngorms National Park, Scotland, UK, July.

Peter Cairns / 2020VISION / Waterfall, Fairy Glen RSPB reserve, Inverness-shire, Scotland, UK, May.

Peter Cairns / 2020VISION / View of a waterfall with a fallen tree in the foreground, Fairy Glen RSPB reserve, Inverness-shire, Scotland, UK, July.

Peter Cairns / 2020VISION / Osprey (Pandion haliaetus) fishing, Cairngorms National Park, Scotland, UK, July.

Peter Cairns / 2020VISION / Osprey (Pandion haliaetus) at surface of a loch after diving for a fish, Cairngorms National Park, Scotland, UK, July.

Peter Cairns / 2020VISION / Osprey (Pandion haliaetus) with fish prey on feeding perch, Cairngorms National Park, Scotland, UK, July.

Peter Cairns / 2020VISION / Osprey (Pandion haliaetus) eating fish prey, Cairngorms National Park, Scotland, UK, July.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) juvenile sitting on a tree, wet from playing in the river, wide angle perspective, Tangkoko National Park, Sulawesi, Indonesia.

Wild Wonders of Europe / Widstrand / Pool Frog (Rana lessonae) sitting on White lily pad, Danube delta rewilding area, Romania

David Pattyn / Black necked grebe (Podiceps nigricollis) frontal view of pair mating, La Dombes lake area, France, April

Ross Hoddinott / Derwent Water, fence, gate and flooding, looking to Catbells mountain, near Keswick, The Lake District, Cumbria, UK. October 2012.

Ben Lascelles / Great Dusky Swift (Cypseloides senex) Birds flying past rainbow created by waterfalls, Iguazu National Park, Argentina, October 2008

Dale Sutton / 2020VISION / Common frog (Rana temporaria) leaping into a pond, controlled conditions, UK.

Linda Pitkin / 2020VISION / Water-crowfoot (Ranunculus fluitans subsp. penicillatus) flowering underwater, Cumbria, England, UK, September. Did you know? The latin name for this genus 'Ranunculus' comes from the Latin for 'Litte...

Linda Pitkin / 2020VISION / Split-level view of the River Leith, showing Water-crowfoot (Ranunculus fluitans subsp. penicillatus) growing underwater, Cumbria, England, UK, September. Did you know? Cumbria is one of the least den...

Linda Pitkin / 2020VISION / Fisheries assistant Stephanie Kershaw and volunteer John Dumont from the Eden Rivers Trust searching for White clawed crayfish (Austropotamobius pallipes) as part of a capture and release conservation...

Linda Pitkin / 2020VISION / White clawed crayfish (Austropotamobius pallipes) on river bed, viewed underwater, River Leith, Cumbria, England, UK, September 2012.

Linda Pitkin / 2020VISION / White clawed crayfish (Austropotamobius pallipes) underwater on riverbed, showing defensive posture, River Leith, Cumbria, England, UK, September 2012. Did you know? White clawed crayfish can live fo...

Linda Pitkin / 2020VISION / White clawed crayfish (Austropotamobius pallipes) underwater on riverbed, River Leith, Cumbria, England, UK, September 2012.

Linda Pitkin / 2020VISION / Brown trout (Salmo trutta) fry on river bed, Cumbria, England, UK, September.

Linda Pitkin / 2020VISION / Fisheries assistant Stephanie Kershaw and volunteer John Dumont at the Eden Rivers Trust electrofishing for juvenile Atlantic salmon (Salmo salar) and Brown trout (Salmo trutta) as part of a capture a...

Luke Massey / 2020VISION / Pond skater (Gerris lacustris) on a pond, Hertfordshire, England, UK, June.

Luke Massey / 2020VISION / Little grebe (Tachybaptus ruficollis) on lake, Surrey, England, UK, April.

Ross Hoddinott / 2020VISION / Tarr Steps, medieval clapper bridge crossing the River Barle, Exmoor National Park, Somerset, UK. May 2012

Ross Hoddinott / 2020VISION / River Exe, near Winsford, showing river correctly fenced to stop cattle from polluting the river, or eroding the river banks. Healthy example of river habitat. Exmoor National Park, Somerset, UK. May...

Ross Hoddinott / 2020VISION / River Stour with early morning mist and frost, near Wimborne Minster, Dorset, UK. April 2012. Did you know? There are five different River Stours in the UK.

Ross Hoddinott / 2020VISION / Large red damselfly {Pyrrhosoma nymphula} emerging from nymphal case, Cornwall, UK. April

Ross Hoddinott / 2020VISION / School children carrying equipment to release salmon fry in the River Haddeo and to do invertebrate kick samples with Westcountry Rivers Trust (WRT) warden. Bury, Exmoor National Park, Somerset, UK. M...

Ross Hoddinott / 2020VISION / School child releases salmon fry in the River Haddeo, with Westcountry Rivers Trust (WRT) warden. Bury, Exmoor National Park, Somerset, UK. May 2012. Editorial use only

Ross Hoddinott / 2020VISION / Common frog (Rana temporaria) portrait, close-up of eye, Cornwall, UK. January. Did you know? Female Common frogs can lay up to 2000 eggs.

Ross Hoddinott / 2020VISION / Common frog {Rana temporaria}, backlit portrait, Cornwall, UK. January 2012.

Michel Roggo / Perch (Perca fluviatilis). Juktan river, tributary of Umeälven river, Lapland, Sweden, July.

Michel Roggo / Grayling (Thymallus thymallus) on spawning ground. Lac de Fenetre, alpine lake, 2456 m above sea level, Canton of Valais, Switzerland, June.

Michel Roggo / Grayling (Thymallus thymallus) on spawning ground. Lac de Fenetre, alpine lake, 2456 m above sea level, Canton of Valais, Switzerland, June.

Michel Roggo / Sockeye / Red Salmon (Oncorhynchus nerka) on spawning migration; males surrounding a female. Adams River, British Columbia, Canada, October.

Michel Roggo / Sockeye / Red Salmon (Oncorhynchus nerka) on spawning migration. Adams River, British Columbia, Canada, October.

Michel Roggo / Sockeye / Red Salmon (Oncorhynchus nerka) on spawning migration. Adams River, British Columbia, Canada, October.

Michel Roggo / Sockeye / Red Salmon (Oncorhynchus nerka) on spawning migration. Adams River, British Columbia, Canada, October.

Michel Roggo / Sockeye / Red Salmon (Oncorhynchus nerka) on spawning migration. Adams River, British Columbia, Canada, October.

Michel Roggo / Atlantic Salmon (Salmo salar) in pool on upstream spawning migration. Quebec, Canada, August.

Terry Whittaker / 2020VISION / Water vole (Arvicola amphibius) eating, Kent, England, UK, July

Terry Whittaker / 2020VISION / Two Water voles (Arvicola amphibius) eating, Kent, England, UK, July

Terry Whittaker / 2020VISION / Water vole (Arvicola amphibius) eating, Kent, England, UK, July

David Pattyn / Great Crested Grebe (Podiceps cristatus) with two young chicks on her back. La Dombes lake area, France, July.

Danny Green / Snow Geese (Chen caerulescens) in flight, silhouetted against colourful dusk sky. Bosque del Apache, New Mexico, USA, November.

Danny Green / Snow Goose (Chen caerulescens), coming in to land. Bosque del Apache, New Mexico, USA, November.

Ross Hoddinott / 2020VISION / Golitha Falls, River Fowey flowing through wooded valley with moss covered trees, Nr St Cleer, Cornwall, UK, May 2012

Mark Carwardine / Looking down on Sumatran rhino (Dicerorhinus sumatrensis) walking through stream. Captive-Sumatran Rhino Sanctuary, within Way Kambas National Park, Lampung Province, southern Sumatra, Indonesia

Mark Carwardine / Amazonian manatee {Trichechus inunguis} calf being fed by hand, Endangered, Captive, Instituto Nacional de Pesquisas da Amazonas, Manaus, Brazil

Mark Carwardine / Mallard (Anas platyrhynchos) drake flying, Bosque del Apache National Wildlife Refuge, New Mexico, USA

Mark Carwardine / Adult male Northern pintail duck (Anas acuta) flying, Bosque del Apache National Wildlife Refuge, New Mexico, USA

Mark Carwardine / Yangtze / Chinese river dolphin / Baiji {Lipotes vexillifer} Critically endangered - officially declared extinct late 2007. This individual (a male called Qi-Qi) was photographed in captivity in 1988...

Mark Carwardine / Amazon river dolphin, pink river dolphin or boto (Inia geoffrensis) Rio Negro, Brazil (Amazon) - wild animal breaching Threatened species (IUCN Red List)

Mark Carwardine / Amazon / Pink river dolphin / Boto {Inia geoffrensis} Rio Negro, Amazon, Brazil Threatened species (IUCN Red List)

Mark Carwardine / Amazon / pink river dolphin / boto (Inia geoffrensis) Rio Negro, Brazil (Amazon) wild animal breaching, Threatened species (IUCN Red List)

Mark Carwardine / Amazon / Pink river dolphin / Boto {Inia geoffrensis} breaching, Rio Negro, Amazon, Brazil Threatened species (IUCN Red List)

Mark Carwardine / Amazon river dolphin, pink river dolphin or boto (Inia geoffrensis) Rio Negro, Brazil (Amazon) - two wild animals fighting over fish Threatened species (IUCN Red List)

Mark Carwardine / Amazon / pink river dolphin / boto (Inia geoffrensis) Rio Negro, Brazil (Amazon) wild animal underwater in tannin rich river, Threatened species (IUCN Red List)

Mark Carwardine / Amazon / pink river dolphin / boto (Inia geoffrensis) Rio Negro, Brazil (Amazon) wild animal underwater in tannin rich river, Threatened species (IUCN Red List)

Mark Carwardine / Amazon / pink river dolphin / boto (Inia geoffrensis) Rio Negro, Brazil (Amazon) wild animal underwater in tannin rich river, Threatened species (IUCN Red List)

Mark Carwardine / School of Common / Koi Carp (Cyprinus carpio) feeding in pond, Mandalay, Burma (Myanmar)

Mark Carwardine / Yangtze river dolphin {Lipotes vexillifer} captive, Wuhan, China, crit endangered

Floris van Breugel / Autumn colors along the shores of Pharaoh Lake in Adirondacks park, New York, USA. October

Floris van Breugel / Sub-alpine larches (Latrix sp.) in late autumn in North Cascades National Park, Washington, USA. October.

Enrique Lopez-Tapia / Man and veiled woman taking a photograph of the River Ganges at sunset, Rajshahi. Bangladesh June 2012. No release available.

Enrique Lopez-Tapia / Men on a wooden boat who use smooth-coated otters (Lutra perspicillata) for traditional fishing practices, the Sundarbans National Park, the largest mangrove swamp in the world. Bangladesh. UNESCO Wo...

Yukihiro Fukuda / Japanese giant salamanders (Andrias japonicus) males in a burrow at the time of spawning, Kurokawa River, Hyougo, Japan, September

Yuri Shibnev / Wild Amur leopard (Panthera pardus orientalis) crossing a fallen tree over a river, Kedrovaya, Pad Reserve, Far East Russia 1987