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

Jack Dykinga / Bighorm sheep (Ovis canadensis) males grouped together before the rutting season. Valley of Fire State Park, Nevada, USA, February.

Klein & Hubert / Mustang horses, chestnut painted overo mare and her buckskin daughter, age two years, Nevada, USA.

Klein & Hubert / Dun foal jumping over a palomino yearling while playing. Nevada, USA.

Ashley Cooper / Sunflower next to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. May 2011

Ashley Cooper / Heliostats, large reflective mirrors directing sunlight to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. June 2011

Jack Dykinga / Eroded salt laden sandstone 'fins' in incredible sculpted forms comprise an area know as 'Little Finland.' Gold Butte National Monument, Nevada, USA. President Barack Obama designated the monument on...

Jack Dykinga / Eroded salt laden sandstone 'fins' in incredible sculpted forms comprise an area know as 'Little Finland.' Gold Butte National Monument, Nevada, USA. President Barack Obama designated the monument on...

Jack Dykinga / Eroded salt laden sandstone 'fins' in incredible sculpted forms comprise an area know as 'Little Finland.' Gold Butte National Monument, Nevada, USA. President Barack Obama designated the monument on...

Floris van Breugel / The first rays of sunshine above the Sierra Crest, illuminating granite, Mitre Basin, Sierra Nevada, Sequoia National Park, California, USA, August

Floris van Breugel / Camping in Big Pine Lakes, Sierra Nevada, Sequoia National Park, California, USA, May

Floris van Breugel / Temple Crag above Second lake, one the of the Big Pine lakes below the Palisade basin, John Muir Wilderness, Sierra Nevada, California, USA, May

Floris van Breugel / Morning light illuminates Mount Whitney, seen from Thor Peak, Sierra Nevada, California, USA, March

Floris van Breugel / Sunrise over Mt Morrison in the far distance, near Convict Lake, Sierra Nevada, California, USA January

Klein & Hubert / Wild donkey / Burro jenny near Joshua trees (Yucca brevifolia), Mojave Desert, Nevada, USA.

Chris Mattison / Giant sequoia (Sequoiadendron giganteum) Sierra Nevada, California, USA, May.

Jouan Rius / Half Dome and Sierra Nevada from Glacier point, Yosemite National Park, California, USA, October 2012.

Floris van Breugel / The granite mountains of the high sierra, with clouds at sunset. Royce Lakes seen from Feather Peak, John Muir Wilderness, Sierra Nevada, California, September 2009

Jack Dykinga / Eroded Aztec sandstone, dating back to the Jurassic, 160 million years ago, colourful banding with fins and dikes produced by erosion, Mojave Desert near Las Vegas, Nevada, USA

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

Diane McAllister / Swainson's Hawk juvenile (Buteo swainsonii) stretching its wings while perched on a fence in rural Palomino Valley. Nevada, USA, August

Diane McAllister / Rufous hummingbird (Selasphorus rufus) drinking nectar from an Agastache bloom in a backyard in Reno. Nevada, USA, August

Diane McAllister / A wild newborn colt (Equus caballus) standing up being nuzzled by its mother. Foothills of Reno, Nevada, USA, May.

Diane McAllister / Newly hatched Western scrub jay chicks (Aphelocoma californica) huddling together in their nest near one last egg. This nest is in a backyard in Reno. Nevada, USA, June

Diane McAllister / Portrait of a wild Horse (Equus caballus). The foothills of southwest Reno, Nevada, USA, May.

Diane McAllister / Mute swan (Cygnus olor) parent guiding its six cygnets back to the pond after feeding on grasses. Manzanita Lake, Reno, Nevada, USA, May

Diane McAllister / Wild stallion (Equus caballus) lying down in the sagebrush and yawning. The foothills south of Reno, Nevada, USA, May.

Diane McAllister / Cosmos (Cosmos bipinnatus), Bachelor buttons / Cornflowers (Centaurea cyanus), and Common poppies (Papaver rhoeas) in a small meadow. Nevada, USA, July

Diane McAllister / Five curious Coyote pups (Canis latrans) at the entrance of their den, looking up at the camera. Suburban southwest Reno, Nevada, USA, April

Diane McAllister / Honey bee (Apis mellifera) approaching a red poppy (Papaver rhoeas) in a small meadow of wildflowers. Nevada, USA, July

Diane McAllister / Male Anna's hummingbird (Calypte anna) hovers in mid-air looking at the camera in a backyard in Reno. Nevada, USA, August

Floris van Breugel / Autumn colours of Aspen tree (Populus tremula) Sierra Nevada, California, USA. September 2009

SINCLAIR STAMMERS / Fossil of a Trilobite (Olenellus / Olenellus gilberti Meek) from the Lower Cambrian period, Chisolm shale, Pioche formation, Half Moon mine, Pioche, Nevada, USA. Pete Lawrance collection

Juan Manuel Borrero / Cherry trees in blossom in spring, Trevelez, La Alpujarra, Sierra Nevada, Andulacia, Spain

Tim Fitzharris / Sierra Nevada, Alabama Hills, California

Jeff Foott / Hiker near waterfall and rainbow, Nevada Fall, Yosemite National Park, California

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

Jeff Foott / Joshua Tree (Yucca brevifolia) group in desert, Virgin Mountains, Gold Butte National Monument, Nevada

Jeff Foott / Desert, Lake Mead, Gold Butte National Monument, Nevada

Tim Fitzharris / Western Juniper (Juniperus occidentalis) and Jeffrey Pine (Pinus jeffreyi) trees, Phipps Peak, Eldorado National Forest, California

Tim Fitzharris / Dana Plateau from Ellery Lake, Sierra Nevada, Inyo National Forest, California

Tim Fitzharris / Dana Plateau from Ellery Lake, Sierra Nevada, Inyo National Forest, California

Thomas Marent / Blue-naped Chlorophonia (Chlorophonia cyanea), Sierra Nevada de Santa Marta, Colombia

Thomas Marent / Blue-naped Chlorophonia (Chlorophonia cyanea), Sierra Nevada de Santa Marta, Colombia

Thomas Marent / Blue-naped Chlorophonia (Chlorophonia cyanea), Sierra Nevada de Santa Marta, Colombia

Thomas Marent / Bay-headed Tanager (Tangara gyrola), Sierra Nevada de Santa Marta, Colombia