Ole Jorgen Liodden / Tasmanian Native hen (Gallinula mortierii) endemic bird of Tasmania. Bruny Island, Tasmania.

Oriol Alamany / Nigel Creek with conifer forest at dusk, Banff National Park, Rocky Mountains, Alberta, Canada

Bert Willaert / Portrait of a Marbled newt (Triturus marmoratus), Portugal, April.

Bert Willaert / Composite image of American fish species introduced to Europe: Pumpkinseed sunfish (Lepomis gibbosus, left), Brown bullhead (Ameiurus nebulosus, right) and Eastern mudminnow (Umbra pygmaea, under), ph...

Christophe Courteau / Giant Otter swimming (Pteronura braziliensis) Pixiam river, Pantanal, Mato Grosso, Brazil.

Christophe Courteau / Yellow bellied toad underside swimming {Bombina variegata} France

Christophe Courteau / Night waterlily {Nymphaea lotus}. Moremi GR, Okavango delta, Botswana.

Christophe Courteau / Local people moving on mokoros, traditional boats of the Okavango delta. Botswana.

Claudio Contreras / American Beaver (Castor canadensis) splashing water with tail, Los Fresnos Ranch, Sonora, northwestern Mexico, February.

Peter Cairns / Woman standing in front of Skogafoss waterfall, Iceland. Model released.

Peter Cairns / Fulmar (Fulmarus glacialis) in flight in front of Skogafoss waterfall, Iceland, June

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) attempting to catch salmon leaping up rapids, Katmai National Park, Alaska, USA

Loic Poidevin / Salmon landing on head of Grizzly bear (Ursus arctos horribilis) as it is leaping up rapids, Katmai National Park, Alaska, USA

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) salmon fishing in river rapids, Katmai National Park, Alaska, USA

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) salmon fishing in river rapids, Katmai National Park, Alaska, USA

Jan Hamrsky / Clubtail dragonfly nymph (Gomphidae) crawling on sunken wood, Europe, May, controlled conditions

Jack Dykinga / Matkatamiba Canyon with its Muave limestone scoured by erosion. Grand Canyon National Park, Arizona. May 2012.

Jack Dykinga / Shore Acres State Park with sandstone bluffs being pounded by tidal shifting surf, creating waterfalls over concretions in the stone. Oregon

Jack Dykinga / The humpback chubs (Gila cypha) amid Grand Canyon wall reflections in the Colorado River near the confluence with the Little Colorado River. Arizona. Vulnerable species.

Mark Taylor / Mt Fitz Roy and Laguna Los Tres, panoramic view, Fitzroy National Park, Argentina

Enrique Lopez-Tapia / Tajun Pokhari Lake (4.600 m) with mountains behind, Sagarmatha National Park (World Heritage UNESCO). Khumbu / Everest Region, Nepal, Himalaya, October 2011.

Andy Trowbridge / Underwater view of rainbow trout (Oncorhynchus mykiss) being released by a fly fisherman in a small spring fed stream, North Canterbury, South Island, New Zealand. December, 2011.

Andy Trowbridge / Split level shot of a fly fisherman (Murray Trowbridge) releasing a large brown trout (Salmo trutta) in a gin clear 'backcountry' river, North Canterbury South Island, New Zealand. January, 2012. Mode...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile male 'Tembo' aged 4 years crossing a river in Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. December 2011.

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) female 'Mopambi' carrying her infant 'Sopo' aged 18 months on her back crossing a river in Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Cent...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years drinking from a river while sub-adult female 'Mosoko' aged 8 years crosses bi-pedally, Bai Hokou, Dza...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years drinking from a river watched by sub-adult female 'Mosoko' aged 8 years and juvenile male 'Mobangi' a...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years approaching a river while sub-adult female 'Mosoko' aged 8 years and juvenile male 'Mobangi' aged 5 y...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile female 'Bokata' aged 6 years walking bi-pedally to cross a river, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Repu...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) sub-adult female 'Mosoko' aged 8 years using her hand to scoop water from a river to drink, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Cen...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile female 'Bokata' aged 6 years walking bi-pedally to cross a river, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Repu...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile male 'Tembo' aged 4 years crossing a river bi-pedally while dominant male silverback 'Makumba' aged 32 years and juvenile male 'Mobangi' aged...

Anup Shah / African Forest elephant (Loxodonta africana cyclotis) herd drinking and wallowing in a river, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. December 2011.

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years walking bi-pedally across a river, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central Afr...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) dominant male silverback 'Makumba' aged 32 years sitting by a river in forest interior, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) sub-adult female 'Mosoko' aged 8 years walking bi-pedally across a river, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Repub...

Anup Shah / Forest buffalo (Syncerus caffer nanus) standing and urinating in a river running through Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. December 2011.

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile female 'Bokata' aged 6 years approaching a river, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. December 2...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile female 'Bokata' aged 6 years feeding on sedge grasses beside a river, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African...

Fiona Rogers / Western lowland gorilla (Gorilla gorilla gorilla) juvenile male 'Tembo' aged 4 years crossing a river bi-pedally, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Republic. Decem...

Graham Eaton / A split level image of a small mountain stream. Cwm Idwal, Snowdonia, Wales, September 2011.

Graham Eaton / Dendritic drainage of the land at the end of the rainy season, a view from the air. Northern Kenya, Africa, November.

Yukihiro Fukuda / Japanese giant salamander (Andrias japonicus) eating the eggs of another salamander, Japan, August

Yukihiro Fukuda / Japanese giant salamander (Andrias japonicus) moving upstream to spawn, Japan, August

Yukihiro Fukuda / Male Japanese giant salamander (Andrias japonicus) in river, Japan, August

Yukihiro Fukuda / Male Japanese giant salamander (Andrias japonicus) protecting his eggs inside his nest, Japan, October

Yukihiro Fukuda / Male Japanese giant salamander (Andrias japonicus) protecting his eggs inside his nest, Japan, September

Yukihiro Fukuda / Japanese giant salamander (Andrias japonicus) eggs, Japan, September

Yukihiro Fukuda / Japanese giant salamander (Andrias japonicus) at the entrance to its nest, raising its head to the surface, Japan, August

Yukihiro Fukuda / Japanese giant salamander (Andrias japonicus) in river, Japan, March

David Pattyn / Giant otter (Pteronura brasiliensis) running at the edge of a river while playing with a family member, Rio Tres Irmaos, Pantanal, Brazil

David Pattyn / Spectacled caiman (Caiman yacare) walking on a sandy shore at the edge of a river at night, Pantanal, Brazil

David Pattyn / Dalmatian pelicans (Pelecanus crispus) group of three on water, Lake Kerkini, Greece, March

David Pattyn / Dalmatian pelican (Pelecanus crispus) resting on water in mist, Lake Kerkini, Greece, March

David Pattyn / Dalmatian pelicans (Pelecanus crispus) group on water in mist, Lake Kerkini, Greece, February

David Pattyn / Red necked grebe (Podiceps grisegena) approaching a competitor in an attempt to drive him away during the courting season, Danube area, Bulgaria, April

David Pattyn / Grey heron (Ardea cinerea) foraging in a shallow lake on a misty morning alongside other herons, La Dombes lake area, France, June

David Pattyn / Little Egret (Egretta garzetta) in a hunting posture while stalking to catch small fish, La Dombes lake area, France, June

David Pattyn / Purple heron (Ardea purpurea) catching fish on a misty morning, La Dombes lake area, France, June

David Pattyn / Great Crested grebe (Podiceps cristatus) swimming in early morning light carrying chick on back, La Dombes area, France, July

David Pattyn / Bewick's swans (Cygnus bewickii) four in flight, Den Bosch, The Netherlands, January

Juan Carlos Munoz / Aerial view over subtropical mangrove wetlands of the Everglades National Park. Florida, USA, February 2012.

Andrew Parkinson / Black-headed gull (Chroicocephalus ridibundus) adult in winter plumage, taking off at dawn from tranquil lake. (Non-ex) Derbyshire, UK. Highly commended, GDT competition 2012, Nature's studio categor...

Doc White / Amazon river dolphin (Inia geoffrensis), Rio Negro, Amazonia, Brazil

Doc White / Amazon river dolphin (Inia geoffrensis), Rio Negro, Amazonia, Brazil

John Waters / Swans (Cygnus sp) on a large water channel at sunrise with mist on the low lying pastures of Tadham Moor, Somerset Levels, Somerset, UK, March 2012

Yukihiro Fukuda / Japanese giant salamander (Andrias japonicus) reaching up to the surface to breathe, Japan, August

Yukihiro Fukuda / Japanese giant salamander hunting at night in a river, Japan, May

Yukihiro Fukuda / Two male Japanese giant salamanders (Andrias japonicus) fertilizing the eggs of a female, Japan, September

Yukihiro Fukuda / Male Japanese giant salamander (Andria japonicus) emerging from a nest hole in order to breathe, Japan, August

Will Watson / Group of men attempting to rescue a vehicle stuck in flood water, River Camerones, Manabi province Ecuador. February 2012. No release available.

Will Watson / Two men crossing a cloud forest river in spate, Jama Coaque Reserve, Manabi Province, Ecuador, February 2012. No release available.

Philippe Clement / Canada goose (Branta canadensis) swimming with goslings in lake, Belgium, May

Matthew Maran / Canada goose (Branta canadensis) gosling portrait, Hornsey, London, UK May

Anup Shah / Topi (Damaliscus lunatus jimela), Eastern White bearded Wildebeest (Connochaetes taurinus) and Common or Plains zebra (Equus quagga burchellii) mixed herd crossing the Mara River as part of annual mig...

Anup Shah / Eastern White bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River as part of annual migration, Masai Mara National Reserve, Kenya, August

Andy Rouse / Mute swans (Cygnus olor) on river during misty sunrise, Wales, UK December

Peter Cairns / 2020VISION / Bogbean / Buckbean (Menyanthes trifoliata) flowering in pool system. Insh Marshes, Scotland, May.

Alex Mustard / 2020VISION / Kayaker on the River Etive, Highlands, Scotland, UK, April 2012. Did you know? Freshwater ecosystems have a higher density of species than either the land or the sea.

Ben Hall / 2020VISION / Grey heron (Ardea cinerea) beneath waterfall. Ambleside, Lake District, UK, November. Highly commended, 'Habitat' category, British Wildlife Photography Awards (BWPA) competition 2012. Did you know? I...

Ben Hall / Whooper swan (Cygnus cygnus) in snowfall. Martin Mere Wetlands Trust, Lancashire,UK, January. 'Animal Portraits' category, British Wildlife Photographer Awards (BWPA) competition 2012.

Peter Cairns / 2020VISION / Estuarine river inlet running across mudflats at dawn, Morecambe Bay, Cumbria, England, UK, February. 2020VISION Book Plate.

Mark Hamblin / 2020VISION / White water lily (Nymphaea alba) in flower, Scotland, UK, July. 2020VISION Book Plate.

Guy Edwardes / 2020VISION / Mute swan (Cygnus olor) on the River Itchen at dawn, Ovington, Hampshire, England, UK, May. 2020VISION Book Plate.

Mark Hamblin / Common sandpiper (Actitis hypoleucos) adult in flight over misty loch at dawn. Cairngorms National Park, Scotland, UK. Highly commended, 'Habitat' category, British Wildlife Photography Awards (BWPA)...

Mark Hamblin / Grey heron (Ardea cinerea) beside drainage ditch at sunrise, Cairngorms National Park, Scotland, UK. Highly commended, 'Habitat' series category, British Wildlife Photography Awards (BWPA) competition...

Solvin Zankl / Fairy Shrimp (Eubranchipus grubii) eggs Digital focus stacking image

Solvin Zankl / Common European toads (Bufo bufo) mating, with membranes closed over eyes for protection, Solling, Central Germany.

Mark Hamblin / 2020VISION / Eddies in the River Sligachan with Marsco in background. Isle of Skye, Scotland, UK, October 2011.

Peter Cairns / 2020VISION / View along Kirkstone Pass. Lake District National Park, Cumbria, September 2011.

Peter Cairns / 2020VISION / Pine regeneration above Rothiemurchus Forest. Cairngorms National Park, Scotland, May 2011.

Terry Whittaker / 2020VISION / Water Vole (Arvicola amphibius / terrestris) foraging by water. Kent, UK, August. Did you know? Although mostly vegetarians, some water voles have been known to eat frogs' legs to get extra protein.

Terry Whittaker / 2020VISION / Water Vole (Arvicola amphibius / terrestris) foraging by water. Kent, UK, August.

Terry Whittaker / 2020VISION / Water Vole (Arvicola amphibius / terrestris) foraging by water. Kent, UK, August.

Paul Williams / Giant otter (Pteronura brasiliensis) adult playing with plastic bottle, Pantanal, Pocone, Brazil

Paul Williams / Tourists watching two wild Jaguar cubs fight on riverbank whilst third looks on from above (Panthera onca) from boat on river, Pantanal, Pocone, Brazil. No release available.