Tents at Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Adult voracious gecko (Gehyra vorax), at night on the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

Woman walking with headlamp at the bottom of canyon with sandstone walls in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia

Ocelot (Leopardus pardalis) at night, Pantanal, Mato Grosso, Brazil, South America

Night view of a man climbing a hill with trees covered with snow and ice, admiring the green of the Northern Lights (Aurora Borealis), Tjautjas, Gallivare municipality, Norrbotten county, Swedish Lapland, Sweden, Scandinavia, Europe

Adult brown greater galago (Otolemur crassicaudatus) at night in the Save Valley Conservancy, Zimbabwe, Africa

A mountain rescue member uses a flare to attract an approaching Sea King helicopter to the casualty site on Fairfield in the Lake District National Park, Cumbria, England, United Kingdom, Europe

Male brown bunyip cicada (Tamasa tristigma) on twig, Hopkins Creek, New South Wales, Australia, Pacific

Common garden katydid (Caedicia simplex) on leaf, Hopkins Creek, New South Wales, Australia, Pacific

A mountain rescue member uses a flare to attract an approaching Sea King helicopter to the casualty site on Fairfield in the Lake District National Park, Cumbria, England, United Kingdom, Europe

Bleating tree frog (Litoria dentata), Hopkins Creek, New South Wales, Australia, Pacific

Juvenile bleating tree frog (Litoria dentata), Hopkins Creek, New South Wales, Australia, Pacific

Caucasian man descending hill near ocean at sunset

Caucasian men hiking in snowy forest with dog

"El Rincon" Campsite at Night, Perito Moreno National Park, Southern Andean Patagonia, Santa Cruz, Argentina

Yamanashi Prefecture, Japan

Milky Way over the Spreewald in front of Jägerstand silhouette, Germany, Brandenburg, Spreewald

Man, Climber, Overhang, Night, Arco, Lago di Garda, Italy

Madagascar Tree Frog (Boophis sp.), Montagne d'Ambre National Park, Africa, Indian Ocean

Gray Fox (Urocyon cinereoargenteus), adult at night climbing Live Oak tree (Quercus virginiana), Dinero, Lake Corpus Christi, South Texas, USA

Panoramic view of the Karwendel Range by full moon, sea of fog, view of the Stubai Alps, Upper Bavaria, Bavaria, Germany, Europe

Red fox (Vulpes vulpes)

Virginia Opossum (Didelphis virginiana), adult climbing dead tree at night with moon, Starr County, Rio Grande Valley, Texas, USA

A mountain ranger is digging out tents after a snowstorm covered them during the night in 14k camp on Mount McKinley, Alaska. Climbers are advised to spare no expense on a expedition-quality tent as it can mean the difference between life and death during a ferocious storm on Denali. Extra poles and repair materials are important in case of damage caused by storms. Plan to take extra pickets, wands or deadmen for tent anchors. Never leave a tent without anchoring it securely. Tents are lost each year due to sudden gusts of wind while the tent was left unattended or drying. Every climbing season High Mountain Rangers of the Denali National Park Service are called to help climbers in need. If possible the patient is brought down to base camp on foot, only in life threatening conditions a helicopter is called to evacuate the patient to a hospital in Anchorage.

A night scene of the Everest Base Camp, where climbers call this home for more than 2 months. They use the site as a base to move up to higher camps and also rest during days of non climbing, Nepal

Glacier campsite with illuminated tents at Mount Shuksan, North Cascades National Park, Washington State, USA

An ice climber checks his gear before starting a climb at night in Provo Canyon.

A leopard, Panthera pardus, climbing a tree while holding an impala in its mouth at night, Aepyceros melampus, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

Pygmy anteater resting {Cyclopes didactylus} Guyana, South America, Note claws for climbing