David Pattyn / Alpine ibex (Capra ibex) struggling in deep snow on a steep slope, Valsavarenche, Gran Paradiso National Park, Aosta Valley, Italy, January

Jack Dykinga / Steep valleys in the foothills of the Temblor Range, carpeted with Coreopsis (yellow) and Phacelia (purple) with patches of orange California poppy (Eschscholzia californica). Carrizo Plain, Californi...

Jack Dykinga / Steep valleys in the foothills of the Temblor Range, carpeted with Coreopsis (yellow) and Phacelia (purple) with patches of orange California poppy (Eschscholzia californica). Carrizo Plain, Californi...

Nick Garbutt / RF - Skull of a male Himalayan ibex (Capra sibirica) (killed by a snow leopard) lying on steep rocky slope. Himalayas, Ladakh, northern India. (This image may be licensed either as rights managed or r...

Hermann Brehm / Snow Leopard (Panthera uncia) climbing steep rock face, Mongolia

Guy Edwardes / Gold Hill in winter, Shaftesbury, Dorset, England, UK. January 2010.

Nick Garbutt / Urial sheep (Ovis vignei) herd running across steep barren slopes. Himalayas near Ulley, Ladakh, India.

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.

Wim van den Heever / Blue sheep (Pseudois nayaur) Hemis National Park, Jammu and Kashmir, India.

Niall Benvie / Bealach na Ba Pass, Wester Ross, Scotland, UK, November 2015.

Kirkendall-Spring / Oak trees (Quercus) in the fog, Figueroa Mountain, Los Padres National Forest, California, USA.

David Pattyn / Alpine ibex (Capra ibex) male in deep snow with icicles behind, Gran Paradiso National Park, Italy. December

David Pattyn / European red fox (Vulpes vulpes crucigera) in deep snow in front of steep rocks. Gran Paradiso National Park, Italy. December

Andy Trowbridge / Yellow-eyed penguin (Megadyptes antipodes) walking up a sand dune towards its nest. Otago Peninsula, Otago, South Island, New Zealand. February. Endangered Species.

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

Hougaard Malan / Waterfall over deep, narrow gorge. Magwa Falls, Pondoland, Eastern Cape, South Africa, June 2012.

Hougaard Malan / Waterfall over deep, narrow gorge. Magwa Falls, Pondoland, Eastern Cape, South Africa. June 2012.

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...

Enrique Lopez-Tapia / The forests of the Modi Khola river valley shrouded in fog. Annapurna Sanctuary, central Nepal, November 2011.

Bruno D'Amicis / Apennine chamois (Rupicapra pyrenaica ornata) adult male. Endemic to the Apennine mountains. Abruzzo, Italy, December.

Bruno D'Amicis / Apennine chamois (Rupicapra pyrenaica ornata) male moving on extremely steep and smooth rock wall. Endemic to the Apennine mountains. Sibillini NP. Marche, Italy, August.

Bruno D'Amicis / Apennine chamois (Rupicapra pyrenaica ornata) herd resting on altitude plateau of Majella Massif, in moonlight with distant urban lights in the background. Endemic to the Apennine mountains. Majella N...

Kirkendall-Spring / Base of Lower Yellowstone Falls on the Yellowstone River in Yellowstone National Park, Wyoming, USA, July 2013.

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

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River and clambering up steep bank. Masai Mara National Reserve, Kenya, July

Denis-Huot / Wildebeest (Connochaetes taurinus) running for down steep bank of the Mara river during migration, Masai-Mara Game Reserve, Kenya

Florian Möllers / Sunrise on steep forested slopes of Zhouzhi Nature Reserve, Qinling Mountains, Shaanxi, China October 2006

Florian Möllers / Fog over the steep slopes of a forested valley in Zhouzhi Nature Reserve, Qinling Mountains, Shaanxi, China 2006

Erlend Haarberg / Eight Rock ptarmigans (Lagopus muta) with snow blowing in wind, Norway, February

Roy Mangersnes / Person stretching after waking up on the Pulpit Rock, 604 meters above the Lysefjorden, Rogaland, Norway, Scandinavia, Model released

Eric Baccega / Eroded rocks at summit of Gorge de la Jonte, Tarn, Causse, Cevennes, France.

Eric Baccega / Eroded rocks at summit of Gorge de la Jonte with Peyreleau village in the background. Tarn, Cause, Cavennes, France.

Jurgen Freund / Aerial view of island with steep limestone cliffs, birds' nests amongst the caves are highly protected or guarded for their commercial value in the Chinese market, Palawan, Philippines, May 2009.

Brent Stephenson / Steep rock walls of the Tracy Arm, carved out by glacial action over millions of years. Alaska, United States, July 2010.

Eric Dragesco / A male Markhor (Capra falconeri) traversing a steep cliff. Tajikistan, Central Asia, November.

Bruno D'Amicis / Red Deer (Cervus elaphus) stag and Dwarf Pine (Pinus mugo) silhouetted at dusk on mountain slope. Western Tatras, Slovakia, September.

Jouan & Rius / Two Lanternflies (Purops intricata) on rainforest tree, Borneo, Sarawak, Malaysia

Konstantin Mikhailov / West Caucasian tur (Capra caucasica) Female on cliff face, Highlands of West Caucasus Mountains in the Bezengi area, Kabardino-Balkaria Republic, Kabardino-Balkarsky State Nature Reserve, Russia.

Oriol Alamany / Glaciar lagoon below Torres del Paine, Torres del Paine National Park, Patagonia, Chile, January 2006

Angelo Gandolfi / View of mist over mountains, Monte Incudine, Parc Naturel Regional de Corse, Corsica island, France, February 2010

Laurent Geslin / House mouse (Mus musculus) walking down sloping beam in light from a window. Switzerland. Captive, May. Property released

Andrew Parkinson / Fulmar (Fulmarus glacialis) rear view of bird hanging in air over steep cliffs, Shetland Islands, Scotland, UK. HIGHLY COMMENDED - Animals in their environment - Wildlife Photographer of the Year c...

Nick Garbutt / RF- Adelie Penguin (Pygoscelis adeliae) on iceberg. Yalour Islands, Antarctic Peninsula, Antarctica. February. (This image may be licensed either as rights managed or royalty free.)

Jerry Monkman / A man climbs "Top of the Prow" rock on Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009, Model released

Jerry Monkman / A man climbs "Top of the Prow" rock on Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009, Model released

Jerry Monkman / A man rock climbing near the top of Cathedral Ledge. Echo Lake State Park, White Mountains, in North Conway, New Hampshire, USA. October 2009, Model released

Patricio Robles Gil / Silhouette of Gelada baboon (Theropitecus gelada) climbing steep cliff, Simien Mountains NP, Ethiopia