Alex Mustard / Green turtle (Chelonia mydas) descending after breathing at the surface. Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea. Tropical West Pacific Ocean.

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

Dave Bevan / Male Great spotted woodpecker (Dendrocopos major) descending down a wooden electricity pole, Carmarthenshire, Wales, UK, June.

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

Steve Downer / Slug (Species unknown) descending on slime rope from leaf. UK. June.

Francois Savigny / Leopard coming down tree {Panthera pardus} Kalahari National Park, Botswana

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) descending trunk of Oak tree, Cairngorms National Park, Highlands, Scotland, UK, October 2015.

Pascal Kobeh / Group of Short-finned pilot whales (Globicephala macrorhynchus) swimming down into deep water, Costa Rica. Pacific ocean.

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

Gavin Hellier / Timelapse of Singapore City Centre and Marina Bay, with descending camera, Singapore, 2011.

Gavin Hellier / Timelapse of Singapore City Centre and Marina Bay, with descending camera, Singapore, 2011.

Radomir Jakubowski / Alpine ibex (Capra ibex) male on mountainside at sunrise, Bernese Alps, Switzerland, July. Received honourable mention in the Big Picture Competition awards 2014. Nominated in the Melvita Nature Image...

Kirkendall-Spring / Snowboarder descending Table Mountain in the Heather Meadows Recreation Area, Washington, USA. March 2013.

Alex Mustard / Diver explores the cathedral at Silfra Canyon, deep fault filled with fresh water in the rift valley between the Eurasian and American tectonic plates, at Thingvellir National Park, Iceland. May 2011....

Alex Mustard / A diver explores Nikulasargj Canyona deep fault filled with fresh water in the rift valley between the Eurasian and American tectonic plates at Thingvellir National Park, Iceland. May 2011. In this ph...

Markus Varesvuo,Markus Varesvuo / Pair of Common ravens (Corvus corax) displaying, Vardo, Norway, March.

Orsolya Haarberg,Orsolya Haarberg / Muskox (Ovibus moschatus) herd, in the Dovrefjell-Sunndalsfjella National Park, Norway. February

Juan Carlos Munoz / People descending into the Thrihnukagigur volcano a dormant volcano, now used for tours, Iceland, Europe, June 2012

Andrew Parkinson / Nuthatch (Sitta europaea) decending the trunk of Silver Birch (Betula verrucsa) tree, Derbyshire, UK. December (non-ex)

Jack Dykinga / Roots of Fig trees (Ficus sp) growing in the collapsed Cenote Oxpeejool (sink hole), near Tekax, Yucatan, Mexico. Afternoon light illuminates the elongated cavern on the right. October 2009

Jack Dykinga / Cenote Samula (sink hole) with elongated roots of a Fig tree (Ficus sp) from ground level descending to the subterranian tourquoise coloured water below. Rays of sulight pass through the hole to illum...

Mitsuaki Iwago / Blue Wildebeest (Connochaetes taurinus) herd descending cliff during migration, Serengeti

Tui De Roy / Glacial tongue of Dugdale and Murray Glaciers descending the Admiralty Mountains into Robertson Bay, Victoria Land, Antarctica

Mark Moffett / Cristian Samper examines the initial descending root of a Clusia hemiepiphyte in rainforest canopy, La Planada, Colombia

David Kjaer / Nuthatch descending silver birch tree, England, UK

Morley Read / Tropical flat snake (Siphlophis compressus) descending down a vine, with Rio Tiputini in the background, Orellana Province, Ecuador. (non-ex)

Morley Read / Drone shot descending over a field planted with potatoes, Cornwall, England, UK, June 2018. (non-ex)

Morley Read / Aerial shot descending towards Wawa Sumaco crater lake, with Sumaco Volcano in background, rainbow and pristine cloudforest, Napo Province, Ecuador, 2018. (non-ex)

Morley Read / Aerial shot descending towards the Amazon rainforest, near Rio Shiripuno in Pastaza Province, Ecuador, 2017. (non-ex)

Morley Read / Aerial shot descending to rainforest canopy, Rio Shiripuno, Pastaza Province, Ecuadorian Amazon. 2017. (non-ex)

Morley Read / Aerial shot descending to rainforest canopy, Rio Shiripuno, Pastaza Province, Ecuadorian Amazon. 2017. (non-ex)

Morley Read / Aerial shot descending over rainforest canopy on a tepui, Rio Nangaritza Valley, Cordillera del Condor. Zamora Chinchipe Province, Ecuador, 2018. (non-ex)

Oscar Dewhurst / Velvet-fronted nuthatch (Sitta frontalis) on tree trunk. Goa, India.

Matthew Maran / Delacour's langur (Trachypithecus delacouri) climbing down a steep cliff face, Ninh Binh, Vietnam, 2018.

Morley Read / Aerial shot descending over montane rainforest canopy, Los Cedros Biological Reserve, Imbabura Province, Ecuador, 2017. (non-ex)

Morley Read / Aerial shot ascending over rainforest canopy at dawn, with the Rio Napo in background, a tributary of the Amazon, Napo Province, Ecuador, 2017. (non-ex)

Morley Read / Aerial view descending over the rainforest, with two Ceiba trees and a clearing planted with maize, Napo Province, Ecuadorian Amazon, 2017. (non-ex)

Morley Read / Aerial shot decending over the Amazon rainforest at sunset, with the Sumaco Volcano and the Cordillera de Galeras in the background, Napo Province, Ecuador, 2017. (non-ex)

Nick Garbutt / Puma (Puma concolor puma) male walking down slope on hillside. Estancia Amarga, near Torres del Paine National Park, Patagonia, Chile. November.

Nick Garbutt / Puma (Puma concolor puma) female walking downhill. Estancia Amarga, near Torres del Paine National Park, Patagonia, Chile. November.

Nick Garbutt / Bornean pygmy squirrel (Exilisciurus exilis) on tree trunk. Kinabatangan River, Sabah, Borneo, Malaysia.

Nick Garbutt / Western red panda (Ailurus fulgens fulgens) climbing downwards. Singalila National Park, India / Nepal border.

Dong Lei / Flying squirrel (Petaurista yunnanensis) in tree at night. Gaoligong Mountain National Nature Reserve, Yunnan Province. May.

Jack Dykinga / Burrowing owl (Athene cunicularia) two juveniles aged approximately 4 months, one descending on other in rough predator practice play. Marana, Arizona, USA. August.

Laurie Hedges / Drone shot zooming in on an oil palm plantation, once rainforest, Rondonia, Brazil, 2019.

SCOTLAND: The Big Picture / Mountain hare (Lepus timidus) runs down a snowy mountain side. Monadhliath Mountains, Scotland.

Duncan Murrell / Batak man descending a tree in Cleopatra's Needle Critical Habitat, Palawan, the Philippines. September 2016.

Tui De Roy / Blue-footed booby (Sula nebouxii), seven diving into sea. Cape Douglas, Fernandina Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), seven diving into sea. Cape Douglas, Fernandina Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), six diving into sea. Cape Douglas, Fernandina Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), five flying, folding wings to dive into water. Cape Douglas, Fernandina Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), two diving into water. Cape Douglas, Fernandina Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) in flight. Espumilla Beach, Santiago Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), three flying downwards. Espumilla Beach, Santiago Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), three diving into sea. Espumilla Beach, Santiago Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), six diving into sea. Espumilla Beach, Santiago Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), six diving into sea. Espumilla Beach, Santiago Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), descending towards sea. Cape Douglas, Fernandina Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) landing amongst others in colony. Punta Vicente Roca, Isabela Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), four diving towards sea. Espumilla Beach, Santiago Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), four diving towards sea. Espumilla Beach, Santiago Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), two diving in synchrony towards sea. Espumilla Beach, Santiago Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii), five folding wings whilst diving towards sea. Espumilla Beach, Santiago Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) folding wings as it dives. Cerro Brujo, San Cristobal Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) folding wings as it dives. Cerro Brujo, San Cristobal Island, Galapagos.

Tui De Roy / Blue-footed booby (Sula nebouxii) folding wings as it dives. Turtle Cove, Santa Cruz Island, Galapagos.

Loic Poidevin / Brown rat (Rattus norvegicus) descending tree trunk. Danube Delta, Romania. May.

Loic Poidevin / Golden jackal (Canis aureus) climbing down tree trunk after eating fish left by Sea eagle. Hooded crows (Corvus cornix) out of focus in foreground. Danube Delta, Romania, May.

Tony Wu / Asian sheepshead wrasse (Semicossyphus reticulatus), male approaching two gravid females during breeding season. Sado, Niigata Prefecture. June.

Fiona Rogers / Bonnet macaque (Macaca radiata) female descending a rocky crevasse . Hampi, Karnataka, India.

Steve Downer / Brown rat (Rattus norvegicus) feeding on bird table at night, Birmingham, England, UK, February.

Nick Upton / Kestrel (Falco tinnunculus) in flight close to cliff face descending on upcurrents, Cornwall, UK, April.

Bruno D'Amicis / Wild Apennine wolf (Canis lupus italicus) descending snowy mountain slope. Central Apennines, Abruzzo, Italy. February. Italian endemic subspecies.

Bruno D'Amicis / Wild Apennine wolf (Canis lupus italicus) descending snowy mountain slope. Central Apennines, Abruzzo, Italy. February. Italian endemic subspecies.

Tony Wu / Starry handfish (Halieutaea stellata) descending back to depth after released from a fishing net. Kochi, Japan.

Nick Upton / Pine marten (Martes martes) male descending garden steps at night on the way to visiting a bird table to forage on fruit and cake left out for martens, Knapdale, Argyll, Scotland, May. Photographed by...

Nick Upton / Pine marten (Martes martes) female descending garden steps at night on the way to visiting a bird table to forage on fruit and cake left out for martens, Knapdale, Argyll, Scotland, May. Photographed...

Tony Wu / Starry handfish / Minipizza batfish (Halieutaea stellata) descending after it was released from a fishing net. Kochi, Japan.

Tony Wu / Starry handfish / Minipizza batfish (Halieutaea stellata) descending after it was released from a fishing net. Kochi, Japan.

Christophe Courteau / Female Eastern lowland gorilla (Gorilla gorilla graueri) feeding in a tree, Kahuzi-Biega National Park, South Kivu, Democratic Republic of Congo.

Philippe Clement / Tracking shot of a female Brown bear (Ursus arctos) climbing down a tree trunk, Bavarian Forest National Park, Germany, May. Captive.

Five Films / Aerial shot descending over an area of wetland in the Atlantic Forest, Reserva Ecologica de Guapiacu, Rio de Janeiro, Brazil, 2015.

Five Films / Aerial shot descending over an area of wetland in the Atlantic Forest, Reserva Ecologica de Guapiacu, Rio de Janeiro, Brazil, 2015.

Five Films / Aerial shot descending into an area of the Atlantic Forest, Reserva Ecologica de Guapiacu, Rio de Janeiro, Brazil, 2015.

Michael W. Richards / Clouds moving in front of full moon, Somerset, England, UK, September.

Steve Downer / Slug (Species unknown) descending on slime rope from leaf. UK. June.

Steve Downer / Slug (Species unknown) descending on slime rope from leaf. UK. June.

Pascal Tordeux / Mountain stream descending from Paneyron, Queyras, Alps, France, August 2014.

Nick Upton / Large flock of Lapwings (Vanellus vanellus) descending to land on partly flooded pasture, with Pochard (Aythya ferina) and Tufted duck (Aythya fuligula) swimming in the foreground, Gloucestershire, En...

Francois Savigny / Leopard coming down tree {Panthera pardus} Kalahari National Park, Botswana

Francois Savigny / Leopard coming down tree {Panthera pardus} Kalahari National Park, Botswana

Nick Upton / Wigeon (Anas penelope) female in flight overhead descending past a reed bed to land on a flooded marsh, Greylake RSPB reserve, Somerset Levels, UK, January.

Alex Mustard / Diver descending into a freshwater cenote (or limestone sinkhole) swimming through beams of sun light beneath forest. Esmeralda cenote, Tamja Ha Cenote, Puerto Aventuras, Quintana Roo, Yucatan, Mexi...

Philippe Clement / Rain cloud forming thick fog descending from steep hillside of Bidean nam Bian in Glen Coe, Argyll, Scottish Highlands, Scotland, UK, September 2016.

Philippe Clement / Rain cloud forming thick fog descending from steep mountainside in evening light at sunset in Glen Coe, Argyll, Scottish Highlands, Scotland, UK, September 2016.

SCOTLAND: The Big Picture / Red squirrel (Sciurus vulgaris) on tree trunk, Cairngorms National Park, Scotland, UK, August.