Nick Upton / Harvest mouse (Micromys minutus) cleaning its nose on Common hogweed (Heracleum sphondylium) flowerhead after release, Moulton, Northampton, UK, June.

Klaus Echle / Red Fox (Vulpes vulpes) walking along a fallen trunk, silhouetted in misty forest. Black Forest, Germany, November.

Pete Oxford / Juvenile Giant Pandas (Ailuropoda melanoleuca) climbing a tree trunk, Wolong China Conservation and Research Centre for the Giant Panda within Wolong Reserve, Sichuan Province, China 2006

Heike Odermatt / Walrus (Odobenus rosmarus) climbing on ice floe, Svalbard, Norway

Bernard Castelein / Silky sifaka (Propithecus candidus) in tree, Marojejy National Park, Madagascar. Critically endagered species.

Terry Whittaker / Man collecting seabird eggs, including those of Common guillemots (Uria aalge), Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Camera attached to helmet, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down cliff to collect seabird eggs, including those of Common guillemots (Uria aalge), Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being raised up cliff to collect seabird eggs, including those of Common guillemots (Uria aalge), Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Camera attached to helmet, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Camera attached to helmet, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Camera attached to helmet, Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Terry Whittaker / Man being lowered down a cliff to collect seabird eggs, including those of Common guillemots (Uria aalge). Skoruvikurbjarg cliffs, Langanes Peninsula, Iceland, May.

Edwin Giesbers / Lemon-yellow tree frog (Hyla savignyi) climbing up grass stem. Cyprus. April.

Morley Read / Timelapse of climbers making their way up to the summit of Cotopaxi Volcano (5897m) after a heavy snowfall, Cotopaxi, Ecuador, December 2018. (non-ex)

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus), three climbing tree. Northern Colombia.

David Pattyn / Tayra (Eira barbara) climbing in a tree in rainforest habitat with fern covered trees, Bellavista private reserve, Mindo cloud forest area, Ecuador, July

Lorraine Bennery / Blue-eyed lemur (Eulemur flavifrons) female in tree. Sahamalaza, Madagascar.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group clambering up slope during journey to bring back food for young. Atka Bay, Antarctica. September.

Nick Upton / European eel (Anguilla anguilla) elver migrating upstream, using an eel pass on the side of a weir, Somerset Levels, England, UK, July.

Tim Laman / Tapanuli Orangutan (Pongo tapanuliensis). Togus, adult flanged male Batang Toru Forest Sumatran Orangutan Conservation Project North Sumatran Province Indonesia

Tim Laman / Tapanuli Orangutan (Pongo tapanuliensis) Beti, juvenile female, daughter of Beta, in the trees, Batang Toru Forest, Sumatran Orangutan Conservation Project, North Sumatran Province, Indonesia

Dave Bevan / Harvest mouse (Micromys minutus) climbing on corn stalks, UK, July. Captive.

Dave Bevan / Harvest mouse (Micromys minutus) climbing a Thistle (Cirsium), UK, July. Captive.

Dave Bevan / Harvest mouse (Micromys minutus) grooming, sitting on a wheat seedhead, UK, July. Captive.

Dave Bevan / Harvest mouse (Micromys minutus) climbing up and chewing on a thistle (Cirsium) stem, UK, July. Captive.

Dave Bevan / Male Blackbird (Turdus merula) catching European eel (Anguilla anguilla) elvers as they migrate up a waterfall, Ceredigion, Wales, UK, July.

Dave Bevan / Male Blackbird (Turdus merula) catching European eel (Anguilla anguilla) elvers as they migrate up a waterfall, Ceredigion, Wales, UK, July.

Dave Bevan / European eel (Anguilla anguilla) elvers migrating up a wet rock next to a waterfall, Ceredigion, Wales, UK, July.

Juergen Freund / Timelapse of Periwinkle snails (Littoraria) climbing up Mangrove (Rhizophora) roots at lowtide, Daintree, Wet Tropics World Heritage Area, North Queensland, Australia.

Juergen Freund / Hand-reared Boongary (Dendrolagus lumholtzi) descending from a tree and climbing onto its carer's back, Atherton Tablelands, Queensland, Australia.

Juergen Freund / Colony of Little red flying foxes (Pteropus scapulatus) at roost, with several bats flying in, landing on others on a branch, Atherton Tablelands, Queensland, Australia.

David Perpinan / Great rufous woodcreeper (Xiphocolaptes major) arriving at nest site in a dead palm tree, climbs down to nest, Pantanal, Mato Grosso do Sul, Brazil.

Magnus Lundgren / Wild Wonders of China / Tibetan macaque (Macaca thibetana) juvenile climbing in a tree in Tangjiahe Nature Reserve, Sichuan Province, China

Yva Momatiuk & John Eastcott / Ice climber scaling Skaftafellsjokull Glacier, Skaftafell National Park, Iceland

Yva Momatiuk & John Eastcott / Ice climber scaling Skaftafellsjokull Glacier, Skaftafell National Park, Iceland

Dave Bevan / Elephant hawk-moth (Deilephila elpenor) caterpiller climbing down a Fuchsia (Fuchsia) plant, Carmarthenshire, Wales, UK, September.

Staffan Widstrand / Wild Wonders of China / Red panda or Lesser panda (Ailurus fulgens) in the humid montane mixed forest, Laba He National Nature Reserve, Sichuan, China

Konrad Wothe / Pair of Rosalia longicorns (Rosalia alpina) climbing up a Beech tree (Fagus sylvatica) whilst mating, Upper Bavaria, Germany, August.

Jack Dykinga / Eroded Chinle shale mounds with colour bands, beneath the Paria Plateau, Vermilion Cliffs National Monument, Paria Canyon Vermilion, Arizona, USA.

Terry Whittaker / Red squirrel (Sciurus vulgaris) leaping between Scots pine tree (Pinus sylvestris)s, lands on camera, Black Isle, Ross and Cromarty, Scotland, February.

Philippe Clement / Three male Alpine ibex (Capra ibex) climbing up a steep mountain rock face, one pushes another one away, Gran Paradiso National Park, Graian Alps, Italy, June.

Philippe Clement / Two male Alpine ibex (Capra ibex) fighting on a steep mountain rock face, Gran Paradiso National Park, Graian Alps, Italy, June.

SCOTLAND: The Big Picture / Pine marten (Martes martes) on top of a car wheel, Ardnamurchan Peninsula, Lochaber, Scotland, UK, June.

Eric Dragesco / Wild Snow leopard (Uncia uncia) climbing among rocks on a mountainside, Altai Mountains, Mongolia, August.

Eric Dragesco / Wild Snow leopard (Uncia uncia) climbing among rocks on a mountainside, Altai Mountains, Mongolia, August.

Andy Rouse / Giant panda (Ailuropoda melanoleuca) cub aged five months falling asleep in a tree in a breeding centre, Chengdu, China. Captive.

Andy Rouse / Giant panda (Ailuropoda melanoleuca) cub aged five months stuck after climbing a tree in a breeding centre, Chengdu, China. Captive.

Ingo Arndt / Harvest Mouse (Micromys minutus) using tail whilst climbing in reed, Germany, captive.

Ingo Arndt / Harvest Mouse (Micromys minutus) using tail whilst climbing in reed, Germany, captive.

Suzi Eszterhas / Giant Panda (Ailuropoda melanoleuca) six-to-eight month old cub in tree, Bifengxia Panda Base, Sichuan, China

Suzi Eszterhas / Giant Panda (Ailuropoda melanoleuca) six-to-eight month old cub in tree, Chengdu, China

Suzi Eszterhas / Giant Panda (Ailuropoda melanoleuca) six-to-eight month old cub, Chengdu, China

Danny Green / Black bears (Ursus americanus) three cubs, one climbing, Minnesota, USA, June

Jack Dykinga / Hairy bird's foot morning glory (Ipomoea leptotoma) flower over Prickly pair (Opuntia sp) Catalina State Park, near Tucson, Arizona, USA, August.

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus) four month old baby scratching, Isla Escudo de Veraguas, Panama

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus) climbing, Isla Escudo de Veraguas, Panama

Cyril Ruoso / Tropical frog (Hyperolius sp) trying to climb onto leaf, Bateke Plateau NP, Gabon.

Yva Momatiuk & John Eastcott / Climber climbing rock, Indian Creek, Utah

Anup Shah / African Elephant (Loxodonta africana) female climbing gully, Masai Mara, Kenya

Roland Seitre / Pileated gibbon (Hylobates pileatus) female climbing through trees, Angkor Centre for Conservation of Biodiversity, Siem Reap, Cambodia. Endangered species.

Sven Zacek / Ural owl (Strix uralensis) chick trying to climb an aspen tree with its beak, talons and wings, Southern Estonia. June.

Sven Zacek / Ural owl (Strix uralensis) chick trying to climb an aspen tree with its beak, talons and wings, Southern Estonia. June.

Juergen Freund / Tolga Bat Hospital volunteer with Little red flying fox (Pteropus scapulatus) crawling over shoulder. Tolga Bat Hospital, Atherton Tablelands, Queensland, Australia. August 2014. Second Place in the M...

Colin Varndell / Harvest mouse (Micromus minutus) climbing between ripe Wheat, Dorset, UK, July.

Gerry Ellis / Orangutan (Pongo pygmaeus) sub-adult male in trees in haze caused by forest clearing, West Kalimantan, Borneo, Indonesia. October, 2015

Juan Carlos Munoz / Northern tamandua (Tamandua mexicana) climbing tree, Corcovado National Park, Osa Peninsula, Puntarenas Province, Costa Rica.

Cyril Ruoso / Verreaux's sifakas (Propithecus verreauxi) in Madagascar ocotillo (Alluaudia procera) trees Berenty, Madagascar.

Cyril Ruoso / Common woolly monkeys (Lagothrix lagotricha) climbing over keeper in Ikamaperou Sanctuary, Amazon, Peru. October 2006.

Pete Oxford / Marine iguana (Amblyrhynchus cristatus) underwater. Fernandina Island. Galapagos, Endemic Species.

Roland Seitre / Kinkajou (Potos flavus) hanging upside down from branch. Captive in Ocean Park, Hong-Kong. Occurs in South and Central Asia.

Roland Seitre / Kinkajou (Potos flavus) on branch. Captive in Ocean Park, Hong-Kong. Occurs in South and Central Asia.

Kevin Schafer / Guatemalan Black Howler Monkey (Alouatta pigra) calling, Community Baboon Sanctuary, Belize, Central America. Endangered species.

Kevin Schafer / Guatemalan Black Howler Monkey (Alouatta pigra) climbing, Community Baboon Sanctuary, Belize, Central America. Endangered species.

Andy Rouse / Giant panda (Ailuropoda melanoleuca) Chengdu, China. Endangered species, captive.

Suzi Eszterhas / Black-handed spider monkey (Ateles geoffroyi), Osa Peninsula, Costa Rica.

Mark Jones / Snares-crested penguin (Eudyptes robustus) group climbing steep route to colony. Snares Island, New Zealand Subantarctic Islands. Endemic. Vulnerable species.

Roland Seitre / Buergers' tree-kangaroo (Dendrolagus goodfellowi buergersi) climbing. Currumbin Sanctuary, Queensland, Australia. Captive, endemic to Papua New Guinea. Endangered species.

Nick Garbutt / Bornean sun bear (Helarctos malayanus euryspilus) climbing tree at Bornean Sun Bear Conservation Centre (BSBCC), Sepilok, Sabah, Borneo.

Adri de Visser / Leopard (Panthera pardus) climbing down tree, Masai Mara, Kenya

Ammonite / Male White-throated / White-faced capuchin (Cebus capucinus) climbing and jumping in canopy, showing use of prehensile tail, Santa Rosa National Park, Costa Rica.

Ammonite / Black-handed / Geoffroy's spider monkey (Ateles geoffroyi) feeding on figs, Santa Rosa National Park, Costa Rica.

Ammonite / Northern tamandua (Tamandua mexicana) climbing down and falling out of tree, showing use of partially prehensile tail, Santa Rosa National Park, Costa Rica.

Ammonite / Northern tamandua (Tamandua mexicana) climbing down tree, showing use of partially prehensile tail, Santa Rosa National Park, Costa Rica.

Ammonite / White-throated / White-faced capuchin (Cebus capucinus) climbing and playing with twig, showing use of prehensile tail, Santa Rosa National Park, Costa Rica.

Ammonite / Juvenile Mantled howler monkey (Alouatta palliata) climbing through canopy, showing use of prehensile tail, Santa Rosa National Park, Costa Rica.

Ammonite / Mantled howler monkey (Alouatta palliata) climbing through canopy, showing use of prehensile tail, Santa Rosa National Park, Costa Rica.

D. Parer & E. Parer-Cook / Lumholtz's Tree-Kangaroo, (Dendrolagus lumholtzi) male, Atherton Tableland, Queensland, Australia

David Pike / Harvest mouse (Micromys minutus) on stalk, West Country Wildlife Photography Centre, captive, June.

Andy Rouse / Giant Panda (Ailuropoda melanoleuca) cub climbing tree. Chengdu, China. Captive.

Jussi Murtosaari / European brown bear (Ursus arctos arctos) two cubs climbing tree, northern Finland, May.

Shattil & Rozinski,Shattil & Rozinski / Black bear (Ursus americanus) cub climbing a fence, Minnesota, USA, May.

Ann & Steve Toon / Harvest mouse (Micromys minutus), captive, UK, June. *Not available for greetings cards, worldwide until November 2016*

Anup Shah / Sumatran orangutan (Pongo abelii) female 'Juni' aged 12 years swinging from a liana. Gunung Leuser National Park, Sumatra, Indonesia. Rehabilitated and released (or descended from those which were rel...

Andy Rouse / Coquerel's Sifaka (Propithecus coquereli) climbing tree, Palmarium Reserve, Madagascar

Andy Rouse / Coquerel's Sifakas (Propithecus coquereli) in coastal rainforest, Palmarium Reserve, Madagascar