Jack Dykinga / Scalding hot water continuously spouting behind layers of mineral deposits, Fly Geyser, Black Rock Desert, Great Basin Desert, Nevada, USA

Nick Garbutt / American bison (Bison bison) female covered in hoar frost near hot spring, portrait. Midway Geyser Basin, Yellowstone National Park, USA. February.

Jack Dykinga / Morning light with autumn coloured Cottonwoods (Populus sp) trees lining the river. Valley of the Gods, Colorado Plateau, of the Great Basin Desert, Utah, USA, November 2018.

Marie Read / California quail (Callipepla californica), male emerging from behind snowbank in winter, Mono Lake Basin, California, USA

Jeff Foott / Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, Wyoming

Jeff Foott / Fumaroles, Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, Wyoming

Jeff Foott / Great Basin Bristlecone Pine (Pinus longaeva) trees, Great Basin National Park, Nevada

Chien Lee / Borneo Opposite-fingered Tree Frog (Chiromantis inexpectatus), new species, Maliau Basin, Sabah, Malaysia

Kirkendall-Spring Photographers / Vicky Spring next to a small tarn, Lyman Lakes Basin, Glacier Peak Wilderness, Wenatchee National Forest, Washington, USA, September 2014. Model released.

Philippe Clement / House spider (Tegenaria duelica) trapped in a washbasin in bathroom, Belgium, September.

Glenn Bartley/ BIA / Versicolored Barbet (Eubucco versicolor) male, Amazon, Peru

Ingo Arndt / Burned trees in front of Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.