Daniel Heuclin / Panamint rattlesnake (Crotalus stephensi) with tongue out and rattle raised, on rock. Amargosa Desert, Nye County, Nevada. May.

Daniel Heuclin / Panamint rattlesnake (Crotalus stephensi) on rock, Amargosa Desert, Nye County, Nevada. May.

Daniel Heuclin / Panamint rattlesnake (Crotalus stephensi) on rock, tongue out and rattle raised. Amargosa Desert, Nye County, Nevada. May.

Jack Dykinga / Mesquite Dunes, with sand patterned ridges against the Amargosa Mountains in afternoon light. Death Valley National Park, California, USA, January.

Jack Dykinga / Mesquite Dunes with sand patterned ridges against the Amargosa Mountains in afternoon light. Death Valley National Park, California, USA, January.

Jack Dykinga / Mesquite Dunes with sand patterned ridges against the Amargosa Mountains in afternoon light. Death Valley National Park, California, USA, January.

Daniel Heuclin / Red coachwip or Red racer (Masticophis flagellum piceus), Amargosa desert, Nevada, May.

Richard Herrmann / Tecopa, looking north-west to the Nopah range, Amargosa Desert, California

Richard Herrmann / Brittlebush (Encelia farinosa), Jubilee Pass, Black Mountains, Amargosa Desert, California

Richard Herrmann / Barrel Cactus (Ferocactus sp) and Amargosa River, near China Ranch, Amargosa Desert, California

Richard Herrmann / Cracked mud, looking east towards the Nopah Range, Amargosa Desert, Tecopa, California

Jack Dykinga / Ripples on sand dunes with Amargosa Mountains in background, Death Valley National Park, California