Jack Dykinga / Twisted and emerging limbs of Saguaro cacti (Carnegiea gigantea) Sonoran Desert near Tucson, Arizona, USA
01286210
John Cancalosi / Sonoran Desert Sidewinder (Crotalus cerastes) with forked tongue extended, Arizona USA
01255465
Jack Dykinga / Silhouettte of Joshua tree (Yucca brevifolia) at sunset with lightning in background, Sonoran / Mojave transition zone, Joshua Forest Parkway, Arizona, USA
01255431
Jack Dykinga / Saguaro cactus (Carnegiea gigantea) twisted by exposure to frost, Maricopa Mountains Wilderness, Sonoran Desert National Monument, Arizona, USA
01255430
Jack Dykinga / Saguaro cacti (Carnegiea gigantea) silhouetted at sunrise, Sand Tank Mountains, Sonoran Desert National Monument, Arizona, USA
01192811
Jack Dykinga / Close-up of the twisted limbs of a freeze-damaged Saguaro Cactus (Carnegiea gigantea), with new limbs emerging. Sonoran Desert National Monument, Arizona
00221568
Tom Vezo / Gila Monster (Heloderma suspectum), Sonoran Desert, Arizona
01180242
Jack Dykinga / Ocotillos (Fouquieria splendens) amongst flowering Mexican Poppies (Eschscholtzia mexicana) on east facing slopes, Sonoran Desert National Monument, Arizona, USA
01180234
Jack Dykinga / Saguaro Cacti (Carnegiea gigantea) in a summer storm at sunset, with a rainbow in the background, Maricopa Mountains, Sonoran Desert National Monument, Arizona, USA
01180243
Jack Dykinga / Sunset at Javalina Mountain and the Sand Tank Mountains, Sonoran Desert National Monument, Arizona, USA
01180244
Jack Dykinga / Saguaro Cacti (Carnegiea gigantea) at sunrise, Sonoran Desert National Monument, Arizona, USA
01180270
Jack Dykinga / Coastal Century Plant (Agave shawii) with red edging and spines, Sonoran Desert, Baja California Sur, Mexico, Central America
01180241
Jack Dykinga / Saguaro Cacti (Carnegiea gigantea) at sunrise, Cabeza Prieta NW Refuge, Sonoran Desert, Arizona, USA
01180233
Jack Dykinga / Teddy Bear Cholla (Opuntia bigelovii) and Saguaro Cacti (Carnegiea gigantea) lit by the afternoon light in the Sand Tank Mountains, Sonoran Desert National Monument, Arizona, USA
01181544
Philippe Clement / American Bobcat (Lynx rufus / Felis rufus) portrait, sitting in front of cave. Arizona, USA. Captive.
01181536
Philippe Clement / Western Black widow (Latrodectus hesperus) spider leaving burrow / hole in wall. Arizona, USA
01164064
John Cancalosi / Desert Cottontail (Sylvilagus auduboni) drinking from a temporary pool of water, Sonoran Desert, Arizona
01164165
Jack Dykinga / Teddy bear cholla cactus {Opuntia bigelovii} growing on volcanic lava flow, Pinacate and Gran Desierto Altar Biosphere Reserve, Sonoran desert, Mexico
01163488
Jack Dykinga / Sand dune patterns, Biosphere Reserve of Pinacate and Gran Desierto Altar, Sonoran desert, Mexico
01164138
Jack Dykinga / Mexico Teddy bear cholla cactus {Opuntia biegelovii} growing on volcanic lava flow, Pinacate and Gran Desierto Altar Biosphere Reserve, Sonoran desert, Mexico
01033274
John Cancalosi / Harris antelope squirrel (Ammospermophilus harrisii) on cactus, Sonoran Desert, Arizona, USA
01033275
John Cancalosi / Harris antelope squirrel (Ammospermophilus harrisii) on cactus, Sonoran Desert, Arizona
Yva Momatiuk & John Eastcott / Gila Woodpecker (Melanerpes uropygialis) nesting in Saguaro (Carnegiea gigantea) in desert, spring, Sonoran Desert National Monument, Arizona
00192319
Konrad Wothe / Cardon (Pachycereus pringlei) cactus photographed by tourist, largest cacti in the world and may live over 200 years, Sonoran Desert, Baja California, Mexico
01033272
John Cancalosi / Harris' antelope squirrel (Ammospermophilus harrisii) Sitting on cactus & eating USA Arizona, Sonoran Desert.
01022308
Jason Venus / Western diamondback rattlesnake {Crotalus atrox} in road at night. BBC Incredible Journeys. Road in the path of snake's migratory route across the Sonoran Desert, Arizona USA. Many killed on road.
00499358
Tim Fitzharris / Teddy Bear Cholla (Cylindropuntia bigelovii) cacti in desert, Kofa Mountain, Kofa National Wildlife Refuge, Arizona
00499299
Tim Fitzharris / Saguaro (Carnegiea gigantea) cacti and Superstition Mountains, Lost Dutchman State Park, Arizona
00482499
Tom Vezo / Saguaro (Carnegiea gigantea) cactus in snow, Saguaro National Park, Tucson, Arizona
00482496
Tom Vezo / Saguaro (Carnegiea gigantea) cactus in snow, Saguaro National Park, Tucson, Arizona
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346176
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346305
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346177
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) in long grass shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346170
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346295
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346171
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346173
John Cancalosi / Sandstone cliffs in the Sonoran desert. Arizona, March 2011.
01346301
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346299
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346168
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346300
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346167
John Cancalosi / Ring-necked Pheasant (Phasianus colchicus), an escaped captive bird living wild. Sonoran desert, Arizona, March.
01346304
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346302
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346290
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346166
John Cancalosi / Ring-necked Pheasant (Phasianus colchicus), an escaped captive bird living wild. Sonoran desert, Arizona, March.
01346291
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346174
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346298
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346294
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346165
John Cancalosi / Ring-necked Pheasant (Phasianus colchicus), an escaped captive bird living wild. Sonoran desert, Arizona, March.
01346303
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346292
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346169
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346175
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346296
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346293
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) flicking tongue, shortly after emerging from winter hibernation site. Sonoran desert, Arizona, March.
01346297
John Cancalosi / Western Diamond-backed Rattlesnake (Crotalus atrox) emerging from winter hibernation site. Sonoran desert, Arizona, March.
01320418
John Cancalosi / Turkey vulture (Cathartes aura) feeding on jackrabbit carcass. Sonoran desert, Arizona, USA, October 2010
01320417
John Cancalosi / Turkey vulture (Cathartes aura) feeding on jackrabbit carcass. Sonoran desert, Arizona, USA, October 2010
01323025
John Cancalosi / Sidewinder rattlesnake (Crotalus cerates) moving over wood, Sonoran desert, Arizona, USA
01313099
Barry Mansell / Sonoran Collared Lizard (Crotaphytus nebrius) portrait of male, Arizona, USA
01318822
John Cancalosi / Gila monster (Heloderma suspectum) Sonoran desert, Arizona, USA
01318821
John Cancalosi / Gila monster (Heloderma suspectum) at entrance to burrow, Sonoran desert, Arizona, USA
01318824
John Cancalosi / Gila monster (Heloderma suspectum) defensive behaviour, Sonoran desert, Arizona, USA
01318823
John Cancalosi / Gila monster (Heloderma suspectum) Sonoran desert, Arizona, USA
01325089
John Cancalosi / Turkey Vulture (Cathartes aura) feeding on jackrabbit carcass, Sonoran desert, Arizona, USA
01325088
John Cancalosi / Turkey Vulture (Cathartes aura) feeding on jackrabbit carcass, Sonoran desert, Arizona, USA
01325087
John Cancalosi / Turkey Vulture (Cathartes aura) feeding on jackrabbit carcass, Sonoran desert, Arizona, USA
01325086
John Cancalosi / Turkey Vulture (Cathartes aura) feeding on jackrabbit carcass, Sonoran desert, Arizona, USA
00343697
Yva Momatiuk & John Eastcott / Opuntia (Opuntia sp) cactus, Sonoran Desert National Monument, Arizona
01295788
Michael D. Kern / Sonoran desert toad (Bufo alvarius) USA
01294705
Neil Lucas / Desert panoramic with Cacti including Saguaro(Carnegiea gigantea) Sonoran Desert, Arizona, USA, June 2007
01294647
Neil Lucas / Saguaro cactus (Carnegiea gigantea) at night, with star constellation 'The plough' visible. Sonoran Desert, Arizona, USA, June 2007
01294648
Neil Lucas / Looking up at Saguaro cactus (Carnegiea gigantea) Sonoran Desert, Arizona, USA, June 2007
01290427
Thomas Lazar / Petroglyphs etched into rocks on edge of Sonoran desert, Signal Hill, Saguaro National Park, Arizona, USA, March 2008
01290410
Thomas Lazar / Weavers Needle rock spire and surrounding Boulder canyon with Spiked cactus on rocks in foreground, Superstition Mountains, Sonoran desert, Arizona, USA, March 2008
01055503
John Cancalosi / Killdeer plover {Charadrius vociferus} with eggs, Sonoran Desert, Arizona, USA.
01286209
John Cancalosi / Sonoran Desert Sidewinder (Crotalus cerastes) portrait, Arizona, USA
01286208
John Cancalosi / Sonoran Desert Sidewinder (Crotalus cerastes) portrait, Arizona, USA
01275644
John Cancalosi / Sonoran Desert Sidewinder rattlesnake (Crotalus cerastes) sensing the air with tongue, Arizona, USA
01275643
John Cancalosi / Sonoran Desert Sidewinder rattlesnake (Crotalus cerastes) sensing the air with tongue, Arizona USA
01258322
Claudio Contreras / Merriam's kangaroo rat (Dipodomys merriami) portrait, Pinacate Biosphere Reserve, Sonoran Desert, Mexico, July
00438955
Tim Fitzharris / Coffee Pot Rock near Sedona, Arizona
00438945
Tim Fitzharris / Oak Creek in Slide Rock State Park near Sedona, Arizona
00438935
Tim Fitzharris / Oak Creek in Slide Rock State Park near Sedona, Arizona
00438932
Tim Fitzharris / Coffee Pot Rock near Sedona, Arizona
00438933
Tim Fitzharris / Oak Creek in Slide Rock State Park near Sedona, Arizona
00438930
Tim Fitzharris / Agave (Agave sp) and Coffee Pot Rock near Sedona, Arizona
01246381
John Cancalosi / Lightning over the Sonoran Desert, Arizona, USA
01246349
John Cancalosi / Arizona / Fishhook barrel cactus (Ferocactus wislizenii) with fruit in snow after desert snow storm, Sonoran Desert, Arizona, USA
01246382
John Cancalosi / Lightning over the Sonoran Desert, Arizona, USA
