Jack Dykinga / Lightning storm with rainbow over Saguaro cactus (Carnegiea gigantea) near Redrock, Arizona State Trust, Sonoran Desert, Arizona. September 2015. Long exposure with lightning trigger.

Fabio Pupin / Peringuey's desert adder, (Bitis peringueyi), sidewinding on dune, Namib desert, Namibia, February . Non-ex.

Robert Valentic / Central bearded dragon (Pogona vitticeps) basking in mallee / heathland habitat on the Murrayville Track in the Big Desert Wilderness of north-western Victoria, Australia.

Robert Valentic / Heath Monitor (Varanus rosenbergi) male enacting a threat display, in mallee/heath habitat near Pinnaroo, South Australia.

Oriol Alamany / Snow leopard (Panthera uncia) female with juvenile, walking in snow, in Spiti Valley, Cold Desert Biosphere Reserve, Himalaya, Himachal Pradesh, India, March

Cyril Ruoso / Przewalski's Horse (Equus ferus przewalskii) herd, Gobi Desert, Mongolia

Jeff Foott / Deciduous forest and pond in autumn, Jordan Pond, Mount Desert Island, Acadia National Park, Maine

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

Christophe Courteau / Ostriches (Struthio camelus) running in the distance in a mirage, Sossusvlei, Namib-Nauckluft National Park, Namib Desert, Namibia.

Ingo Arndt / Desert chameleon crossing sand leaving tracks, Namibia {Chamaeleo namaquensis}

Ingo Arndt / Desert chameleon on sand, Namib Naukluft NP, Namibia

Jack Dykinga / Desert landscape with flowering Sand verbena (Abronia), Desert gold (Geraea canescens), and Birdcage evening primrose (Oenothera deltoides), with the Santa Rosa Mountains in background. Anza-Borrego...

Jack Dykinga / Desert landscape at sunset, with flowering Sand verbena (Abronia), Desert gold (Geraea canescens), and Birdcage evening primrose (Oenothera deltoides), with the Santa Rosa Mountains in background. An...

Jack Dykinga / Desert landscape with flowering Sand verbena (Abronia), Desert gold (Geraea canescens), and Birdcage evening primrose (Oenothera deltoides), with the Santa Rosa Mountains in background. Anza-Borrego...

Jack Dykinga / Desert landscape with flowering Sand verbena (Abronia), Desert gold (Geraea canescens), and Birdcage evening primrose (Oenothera deltoides), with the Santa Rosa Mountains in background. Anza-Borrego...

Jack Dykinga / Whipple Mountain foothills, with flowering Notch-leaf scorpion-weed (Phacelia crenulata) and Heartleaf evening primrose (Camissonia cardiophylla) with the Riverside and Big Maria Mountains in the back...

Jack Dykinga / Whipple Mountain foothills, with flowering Notch-leaf scorpion-weed (Phacelia crenulata) and Heartleaf evening primrose (Camissonia cardiophylla) with the Riverside and Big Maria Mountains in the back...

Jack Dykinga / Whipple Mountain foothills, with flowering Notch-leaf scorpion-weed (Phacelia crenulata) and Heartleaf evening primrose (Camissonia cardiophylla) with the Riverside and Big Maria Mountains in the back...

Jack Dykinga / 1563786 - - Desert landscape with flowering Sand verbena (Abronia), Desert gold (Geraea canescens), and Birdcage evening primrose (Oenothera deltoides), with the Santa Rosa Mountains in background. An...

Jack Dykinga / Whipple Mountain foothills, with flowering Notch-leaf scorpion-weed (Phacelia crenulata) and Heartleaf evening primrose (Camissonia cardiophylla) with the Riverside and Big Maria Mountains in the back...

Jack Dykinga / Desert landscape with flowering Sand verbena (Abronia), Desert gold (Geraea canescens), and Birdcage evening primrose (Oenothera deltoides), with the Santa Rosa Mountains in background. Anza-Borrego...

Juan Carlos Munoz / Namib sand snake (Psammophis namibensis) in sand dunes, Swakopmund, Erongo Region, Namibia.

Floris van Breugel / Beavertail cactus (Opuntia basilaris) in otherwise stark desert, Alabama Hills, Owen's Valley, California, USA May

Floris van Breugel / Barrel cacti (Ferocactus pilosus) and Ocotillo overlook Palm oasis at sunrise, Anza-Borrego Desert State Park, California, USA March

Floris van Breugel / Horned lark (Eremophila alpestris) wanders through spring wildflowers of the Anza-Borrego desert, California, USA March

Floris van Breugel / Dune primrose, Sand verbena, and Desert gold emerge from the sand after brief spring rains in Anza-Borrego Desert State Park, California, USA March

Floris van Breugel / Dune primrose, Sand verbena, and Desert gold emerge from the sand after brief spring rains in Anza-Borrego Desert State Park, California, USA March

Yva Momatiuk & John Eastcott / Sand dunes and scattered rocks, Death Valley National Park, California

Wim van den Heever / Quiver tree forest (Aloe dichotoma) at night with stars and the Milky Way, Keetmanshoop, Namibia.

Jack Dykinga / Lightning storm with rainbow over Saguaro cactus (Carnegiea gigantea) Avra Valley, Saguaro National Park, Tucson Mountains, Arizona, USA, August 2015. Long exposure with lightning trigger.

Colin Monteath/ Hedgehog House / Sand dune at sunrise, Simpson Desert, Northern Territory, Australia

Colin Monteath/ Hedgehog House / Spinifex Grass (Spinifex sp) on sand dune with footprints, Simpson Desert, Northern Territory, Australia

Cyril Ruoso / Queen of the Andes (Puya raymondii) Cordillera Blanca Massif, Andes, Peru, November.

Bruno D'Amicis / Sand viper (Cerastes vipera) sidewinding on sand dunes. Grand Erg Oriental, Kebili Governorate. Tunisia.

Bruno D'Amicis / Desert monitor (Varanus griseus) moving across sand dunes, showing characteristic tracks, in the Sahara, Tunisia.

Roland Seitre / Dromedary (Camelus dromedarius) mother and calf in desert, Sahara Desert, Jebil National Park, Tunisia

Roland Seitre / Dromedary (Camelus dromedarius) mother and calfs in desert, Jebil National Park, Sahara Desert, Tunisia

Roland Seitre / Dromedary (Camelus dromedarius) mother and calf in desert, Jebil National Park, Sahara Desert, Tunisia

Roland Seitre / Dromedary (Camelus dromedarius) mother and calf in desert, Jebil National Park, Sahara Desert, Tunisia

Daniel Heuclin / Western diamondback rattlesnake (Crotalus atrox) tasting air, in habitat, Arizona, USA, October. Controlled conditions

Jack Dykinga / Frost damaged Saguaro cactus (Carnegiea gigantea) with sunset light shining through limbs. South Maricopa Mountains Wilderness, Arizona, USA, March 2015.

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) with twisted arms at sunset, with Ajo Mountains in the background, Arizona, USA.

Jack Dykinga / Saguaro Cactus (Carnegiea gigantea) with flower cluster emerging from the tip of its limb, Saguaro National Park, Arizona, USA.

Donald M. Jones / Desert Bighorn Sheep (Ovis canadensis nelsoni) pair in urban neighborhood, North America

Chris Mattison / Sidewinder (Crotalus cerstastes) in sand dunes, Anza-Borrego Desert State Park, California, USA, May.

Daniel Heuclin / Red coachwip or Red racer (Masticophis flagellum piceus) eating Sceloporus lizard, Catalina foothill, Arizona, June.

Daniel Heuclin / Mojave rattlesnake (Crotalus scutulatus) Mojave desert, California, June.

Ann & Steve Toon / Black hairy thicktailed scorpion (Parabuthus villosus), Namib Desert, Namibia, April

Ann & Steve Toon / Namaqua chameleon (Chamaeleo namaquensis), Namib Desert, Namibia, April

Laurent Geslin / Vehicles tracks in sand, Etosha NP, Namibia

Laurent Geslin / Indian gazelle (Gazella bennetti) Thar desert, Rajasthan, India

Ben Cranke / African elephant (Loxodonta africana) herd walking in procession, Kaokoveld Desert, Namibia

Erlend Haarberg,Erlend Haarberg / Aerial view down river to the east of the Hofsjakull glacier and west of the Sprengisandur upland desert. Innumerable rivulets flow from beneath the glacier in this area of tundra which abounds in pon...

Daniel Heuclin / Sand Viper (Cerastes vipera) in shade of grass, Erg Chigaga, Morocco

Konrad Wothe / Sand dunes in the Libyan desert, Sahara, Libya, North Africa, December 2007

Konrad Wothe / Dromedary camel (Camelus dromedarius) Caravan in the Libyan desert, Sahara, North Africa, December 2007. No release available.

Konrad Wothe / Sand dunes in the Libyan desert, Sahara, Libya, North Africa, December 2007

Konrad Wothe / Fata Morgana, water mirage in the Libyan desert, Libya, North Africa, November 2007

Roland Seitre / Antoine Cadi, scientist, and assistant measure the shell of an African spurred tortoise (Centrochelys / Geochelone sulcata) Sahel desert, Ferlo North Reserve, Senegal, West Africa, Vulnerable species....

Roland Seitre / African spurred tortoise (Centrochelys / Geochelone sulcata) Sahel desert, Ferlo North Reserve, Senegal, West Africa, Vulnerable species

Eric Dragesco / Gobi Bear (Ursus arctos gobiensis) running in desert habitat, Gobi National Park, Mongolia

Theo Allofs / African Elephant (Loxodonta africana) herd crossing desert, Skeleton Coast, Namib Desert, Namibia

Theo Allofs / African Elephant (Loxodonta africana) female and calves crossing desert, Skeleton Coast, Namib Desert, Namibia

Rolf Nussbaumer / Cane Toad / Marine Toad / Giant Toad (Bufo marinus) adult in desert. Laredo, Webb County, South Texas, USA, April.

Juergen Freund / Olive python (Liasis olivaceus) perched on top of a termite mound. Many pythons shelter in hollow termite mounds when not hunting. Queensland, Australia, February

Chris Shields / Illustration of wildlife at African waterhole: Water buffalo (Syncerus caffer),gazelle,African lion (Panthera leo),African elephant (Loxodonta sp), weaver birds (Ploceidae).

Bernard Castelein / Herd of Tibetan Wild Ass (Equus kiang) with view of snow capped mountains behind, Tso Kar lake, Ladakh, India, June 2010

Vincent Grafhorst / African Lion (Panthera leo) male and female courting, Khutse Game Reserve, Botswana

Staffan Widstrand / Mountain gazelle (Gazella gazella) Dubai Desert Conservation Reserve, Dubai, UAE, February

Hanne & Jens Eriksen / Arabian gazelle {Gazella gazella} and Chestnut-bellied sandgrouse {Pterocles exustus} drinking from pool of water, Oman

Jouan & Rius / View of Pinnacles desert after heavy rainfall, Nambung National Park, Western Australia. August 2009

Jouan & Rius / Limestone formations in the Pinnacles desert, Nambung National Park, Western Australia. August 2009

Jouan & Rius / Aerial view of Limestone formations in the Pinnacles desert, Nambung National Park, Western Australia. August 2009

Jouan & Rius / Limestone formations in the Pinnacles desert, Nambung National park, Western Australia. July 2009

Ann & Steve Toon / Namaqua / Desert chameleon (Chamaeleo namaquensis) Namib desert, Namibia, Africa

Solvin Zankl / Desert scorpion {Parabuthus villosus} Namib desert, Namibia

Tony Phelps / Oman saw-scaled / carpet Viper (Echis omanensis) in habitat, Al Wadi Bih, Musundam Plateau, Oman. April 2008

Jack Dykinga / Gopher snake (Pituophis sp) amongst Lechuguilla (Agave lechuguilla) and prickly pear cacti (Opuntia macrocentra), Maderas del Carmen Natural Reserve, Mexico

Tony Phelps / Arabian Horned Viper (Cerastes gasperetti) in desert, Sharjah, UAE

Tim Fitzharris / Vervain (Verbena officinalis) at Franklin Mountains State Park, Chihuahuan Desert, Texas

Michael Durham / Western Long-eared Myotis (Myotis evotis) about to drink from a man-made guzzler, high-desert transition zone in the Deschutes National Forest, Oregon

Michael Durham / Western Pipistrelle (Pipistrellus hesperus) bat flying over desert scrub, near Pine Creek in the John Day Fossil Beds National Monument, Clarno Unit, Oregon, this is the smallest bat found north of Me...

Jean-Pierre Zwaenepoel / Southern plains gray / Hanuman langur {Semnopithecus dussumieri} group sitting in sun, Thar desert, Rajasthan, India

Luiz Claudio Marigo / Toborochi tree {Chorisia insignis} in Gran Chaco NP, Bolivia, chaco vegetation

Pete Oxford / Car crossing Uyuni, largest salt pan in world, south west Bolivia, South America

Jim Brandenburg / Gemsbok (Oryx gazella) running across sand dune, Namib Desert, Namibia

Gerry Ellis / Palm trees growing out of sand in oasis, Oasis Dakhia, Sahara Desert, Egypt

Mark Moffett / Darkling Beetle (Onymacris unguicularis) collecting dew on its upturned body, Namib Desert, Namibia

Jim Brandenburg / Gemsbok (Oryx gazella) on sand dune, Namib Desert, Namibia

Rolf Nussbaumer / Desert marigold flowers {Baileya multiradiata} Big Bend NP. Texas, USA.

Sharon Heald / Common zebra herd at waterhole {Equus quagga} Etosha NP, Namibia

Pete Oxford / Yellow Armadillo (Euphractus sexcinctus) walking beneath a cactus, Caatinga habitat, South America

Gerry Ellis / Common Barking Gecko (Ptenopus garrulus) licking its eye, Kalahari Desert, Botswana

Gerry Ellis / Thorny Devil (Moloch horridus) overhead view, native to the Central Desert, Western Australia

Konrad Wothe / Dromedary (Camelus dromedarius) camel with young, Egypt

Larry Minden / Desert Tortoise (Gopherus agassizii) emerging from burrow beneath Mohave Desertrue (Thamnosma montana), Mojave Desert, California