John Cancalosi / Rain storm in the Sonoran desert, with Saguaro cacti (Carnegiea gigantea), near Tucson, Arizona. 2018.

Jack Dykinga / Twisted Saguaro cactus (Carnegiea gigantea) Catalina State Park, near Tucson, Arizona, USA, September.

Jack Dykinga / Hairy bird's foot morning glory (Ipomoea leptotoma) flower over Prickly pair (Opuntia sp) Catalina State Park, near Tucson, Arizona, USA, August.

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.

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

Jack Dykinga / Twisted and emerging limbs of Saguaro cacti (Carnegiea gigantea) Sonoran Desert near Tucson, Arizona, USA

Jack Dykinga / Dramatic rosette of spiked leaves of a Yucca plant, Tucson, Arizona, USA

Jack Dykinga / Close up of Saguaro cactus (Carnegiea gigantea) and Teddybear cholla (Cylindropuntia bigelovii) in evening light, Tucson Mountain Park, Arizona, USA

Jack Dykinga / Saguaro Cactus (Carnegiea gigantea) with new flowers emerging at the tip of its limb, Tucson Mountains, Saguaro NP, Arizona, USA

Jack Dykinga / Signal Hill petroglyphs at sunset with Saguaro Cacti (Carnegiea gigantea) and Tucson Mountains in the background, Saguaro National Monument, Arizona, USA

Jack Dykinga / Saguaro Cacti (Carnegiea gigantea) with detail of the cactus spines, Tucson Mountains, Saguaro NP, Arizona, USA

Philippe Clement / Rock art in the Tucson Mountains, created by the Hohokam Indians, showing geometrical shaped petroglyphs, Saguaro NP, Arizona, USA May 2007

Tom Vezo / Gambel's quail male {Callipepla gambelii} Tucson, Arizona, USA

John Cancalosi / Lightning, Tucson, Arizona, USA.

Tom Vezo / Mourning dove {Zenaida macroura} Tucson, Arizona, USA

Tom Vezo / Northern shoveler duck pair landing {Anas clypeata} Tucson, Arizona, USA

Jack Dykinga / Caltrops summer poppies (Kallstroemia grandiflora) blooming amid mesquite trees (Prosopis sp.) infront of the Santa Catalina Mountains. July, after summer monsoon rains. Catalina State Park, near Tucs...

Jack Dykinga / Arizona poppies (Kallstroemia grandiflora) blooming amongst Mesquite (Prosopsis sp) trees with Santa Catalina mountains in background. Post summer monsoon rain, evening light. Sonoran Desert, Catalina...

Jack Dykinga / Dust and sand storm sweeping across Sonoran Desert at sunset to Picacho Peak, Picacho Peak State Park, Arizona, USA. August, 2018.

Jack Dykinga / Arizona poppy (Kallstroemia grandiflora) blooming amongst Mesquite (Prosopsis sp) trees with Santa Catalina mountains in background. Post summer monsoon rains, evening light. Sonoran Desert, Catalina...

Tim Fitzharris / Saguaro (Carnegiea gigantea) cactus with holes made by woodpeckers, Tucson Mountains, Arizona

Jack Dykinga / Murmuration of Yellow headed blackbird (Xanthocephalus xanthocephalus) flying at sunset, Sonoran Desert, Near Tucson, Arizona, USA.

Jack Dykinga / Murmuration of Yellow headed blackbird (Xanthocephalus xanthocephalus) flying at sunset, Sonoran Desert, Near Tucson, Arizona, USA.

Jack Dykinga / Murmuration of Yellow headed blackbird (Xanthocephalus xanthocephalus) flying at sunset, Sonoran Desert, Near Tucson, Arizona, USA.

Jack Dykinga / Murmuration of Yellow headed blackbird (Xanthocephalus xanthocephalus) flying at sunset, Sonoran Desert, Near Tucson, Arizona, USA.

Jack Dykinga / Murmuration of Yellow headed blackbird (Xanthocephalus xanthocephalus) flying at sunset, Sonoran Desert, Near Tucson, Arizona, USA.

Jack Dykinga / Desert agave (Agave deserti) Sonoran Desert near Tucson Mountains, Arizona, USA. Taken with digital focus stacking.

Jack Dykinga / Twisted Saguaro cactus (Carnegiea gigantea) Catalina State Park, near Tucson, Arizona, USA, September.

Jack Dykinga / Twisted Saguaro cactus (Carnegiea gigantea) Catalina State Park, near Tucson, Arizona, USA, September.

Jack Dykinga / Cactus wren (Campylorhynchus brunneicapillus) building its nest amongst the sharp spines of a Chain cholla cactus (Cylindropuntia fulgida), Sonoran Desert near Tucson, Arizona, USA. July.

Jack Dykinga / Cactus wren (Campylorhynchus brunneicapillus) building its nest amongst the sharp spines of a Chain cholla cactus (Cylindropuntia fulgida), Sonoran Desert near Tucson, Arizona, USA. July.

Jack Dykinga / Cactus wren (Campylorhynchus brunneicapillus) carrying nest-building material in its beak for its nest amongst the sharp spines of a Chain cholla cactus (Cylindropuntia fulgida), Sonoran Desert near T...

Kevin Schafer / Saguaro (Carnegiea gigantea) cactii in desert, Tucson Mountain Park, Tucson, Arizona

Jack Dykinga / Boulders near Windy Point, Santa Catalina Mountains, Coronado National Forest, with Catalina Mountain ridges and the Tucson Mountains, Arizona, USA. September 2016.

Jack Dykinga / Geology Vista, with granite boulders against the Tucson's city lights under the Milky Way, Santa Catalina Mountains, Coronado National Forest, Arizona, USA, September.

Tim Fitzharris / Saguaro (Carnegiea gigantea) cacti, Tucson Mountains, Arizona

Tim Fitzharris / Saguaro (Carnegiea gigantea) cacti in desert, Tucson Mountains, Arizona

Tim Fitzharris / Saguaro (Carnegiea gigantea) cactii, Tucson Mountains, Saguaro National Park, Arizona

Tim Fitzharris / Saguaro (Carnegiea gigantea) cactii in desert, Tucson Mountains, Saguaro National Park, Arizona

Tim Fitzharris / Saguaro (Carnegiea gigantea) cactii, Tucson Mountains, Saguaro National Park, Arizona

Jack Dykinga / American bobcat (Lynx rufus baileyi) yawning and resting. Santa Catalina Mountains, Coronado National Forest, Tucson, Arizona, USA, July.

Jack Dykinga / American bobcat (Lynx rufus baileyi) resting on patio, Santa Catalina Mountains, Coronado National Forest, Tucson, Arizona, USA, July.

Jack Dykinga / American bobcat (Lynx rufus baileyi) resting on shade 'sails' over patio in garden. Santa Catalina Mountains, Coronado National Forest, Tucson, Arizona, USA, July.

Jack Dykinga / Saguaro Cactus (Carnegiea gigantea) with flower cluster, Saguaro National Park, Tucson Mountain Unit, Arizona, USA, August.

Daniel Heuclin / Regal Horned Lizard (Phrynosoma solare) hidden under dirt, near Tucson, Arizona, USA, April

Daniel Heuclin / Regal Horned Lizard (Phrynosoma solare) near Tucson, Arizona, April

Tom Vezo / Saguaro (Carnegiea gigantea) cactus in snow, Saguaro National Park, Tucson, Arizona

Tom Vezo / Saguaro (Carnegiea gigantea) cactus in snow, Saguaro National Park, Tucson, Arizona

Tom Vezo / Luzon Peacock Swallowtail (Papilio chikae) butterfly, Tucson Botanical Gardens, Tucson, Arizona

Tom Vezo / Swallowtail (Papilionidae) butterfly on girl's hand, Tucson Botanical Gardens, Tucson, Arizona

Tom Vezo / Grey Pansy (Junonia atlites) butterfly, Tucson Botanical Gardens, Tucson, Arizona

Tom Vezo / Dark Blue Tiger (Tirumala septentrionis) butterfly, Tucson Botanical Gardens, Tucson, Arizona

Tom Vezo / Chinese Oak Silk Moth (Antheraea pernyi), Tucson, Arizona

Tom Vezo / Emperor Swallowtail (Papilio ophidicephalus) butterfly, Tucson Botanical Gardens, Tucson, Arizona

Tom Vezo / Malay Cruiser (Vindula dejone) butterfly, Tucson Botanical Gardens, Tucson, Arizona

Tom Vezo / Luzon Peacock Swallowtail (Papilio chikae) butterfly, Tucson Botanical Gardens, Tucson, Arizona

Tom Vezo / Angled Leafwing (Anaea glycerium) butterfly mimics dead leaf, Tucson Botanical Gardens, Tucson, Arizona

Tom Vezo / Morpho Butterfly (Morpho achilles), Tucson Botanical Gardens, Tucson, Arizona

Jack Dykinga / Lines of Saguaro cacti (Carnegiea gigantea) at dawn with the snowy north face of the Santa Catalina Mountains dominated by Table Mountain near Tucson, Arizona, USA

Daniel Heuclin / Desert Western Patch nosed Snake (Salvadora hexalepis hexalepis) head profile, near Tucson, Arizona, USA, controlled conditions

Daniel Heuclin / Desert Western Patch-nosed Snake (Salvadora hexalepis hexalepis) near Tucson, Arizona, USA, controlled conditions

Daniel Heuclin / Gila monster (Heloderma suspectum) eating eggs, Near Tucson, Arizona, USA captive

Mark Moffett / Tarantula Hawk (Pepsis sp) feeding on Asclepia (Asclepias sp) flower nectar, Tucson, Arizona

Mark Moffett / Cactus Bee (Diadasia sp) feeding on barrel cactus nectar, Tucson, Arizona

Mark Moffett / Cactus Bee (Diadasia sp) feeding on barrel cactus nectar, Tucson, Arizona

Barry Mansell / Tucson Shovel-nosed Snake (Chionactis occipitalis klauberi) flicking tongue, Arizona, USA

Donald M. Jones / Black-tailed Jackrabbit (Lepus californicus) in desert, Tucson, Arizona

John Cancalosi / Aravaipa Canyon Wilderness, an 11 mile long canyon that cuts through the north end of Galiuro Mountains. Tucson, Federal Wilderness Area, USA

Tom Vezo / Burrowing owl {Athena cunicularia} four chicks at entrance to nest burrow, Tucson, Arizona, USA

John Cancalosi / Old aircraft parts at aircraft restoration facility near airplane boneyard, Tucson, Arizona, USA

John Cancalosi / Old aircraft at aircraft restoration facility near areoplane boneyard, Tucson, Arizona, USA

Kevin Schafer / Torch Cactus (Trichocereus sp) flowers, Arizona-Sonora Desert Museum, Tucson, Arizona

John Cancalosi / Mission San Xavier del Bac with Saguaro Cactus in foreground, Tohono O'odham reservation near Tucson, Arizona, USA

Norbert Wu / Hammond's Spadefoot Toad (Spea hammondii), Arizona-Sonora Desert Museum, Tucson, Arizona

Norbert Wu / Bighorn Sheep (Ovis canadensis) ewe, Arizona-Sonora Desert Museum, Tucson, Arizona

Norbert Wu / Sonora Chub (Gila ditaenia) swimming, Arizona-Sonora Desert Museum, Tucson, Arizona

Norbert Wu / Desert Pupfish (Cyprinodon macularius) pair, Arizona-Sonora Desert Museum, Tucson, Arizona

Norbert Wu / Desert Pupfish (Cyprinodon macularius) pair, Arizona-Sonora Desert Museum, Tucson, Arizona

Jack Dykinga / Saguaro Cacti (Carnegiea gigantea) silhouetted at sunset in the Tucson Mountains West unit, Saguaro NP, Arizona, USA

Jack Dykinga / Full moon rising over Saguaro Cacti (Carnegiea gigantea) at sunset, Tucson Mountains, Saguaro National Monument, Arizona, USA

Rob Tilley / Saguaro cactus flower (Carnegiea gigantea) detail with fly, against blue sky. Sonora Desert Museum, Tucson, Arizona. April 2006

Philippe Clement / Rock art in the Tucson Mountains, created by the Hohokam Indians, showing geometrical shaped petroglyphs, Saguaro NP, Arizona, USA

Philippe Clement / Rock art, created by the Hohokam Indians, showing spiral petroglyph with the Tucson Mountains in the background, Saguaro NP, Arizona, USA

Philippe Clement / Rock art, created by the Hohokam Indians, showing spiral petroglyph with the Tucson Mountains in the background, Saguaro NP, Arizona, USA

Philippe Clement / Rock art in the Tucson Mountains, created by the Hohokam Indians, showing geometrical shaped petroglyphs, Saguaro NP, Arizona, USA May 2007

David Kjaer / Saguaro Cactus and view over Tucson from Catalina Mountains, Arizona USA

Tom Vezo / Northern Shoveler (Anas clypeata) flock of six birds flying, Tucson, Arizona

Tom Vezo / Northern Shoveler (Anas clypeata) male flying, Tucson, Arizona

Tom Vezo / Gila Woodpecker (Melanerpes uropygialis) male and female at nest in Saguaro (Carnegiea gigantea) with food, Tucson, Arizona

Jack Dykinga / Saguaro cactus {Carnegia gigantea} at sunset silhouetted against summer storm clouds, Tucson Mountain Park, Arizona, USA

Rob Tilley / Ocotillo / Coachwhip / Jacob's Staff in flower (Fouquieria splendens) against the sky, Sonora Desert Museum, Tucson, Arizona, USA

Patricio Robles Gil / Teddy Bear Cholla (Cylindropuntia bigelovii) and California Poppies (Eschscholzia californica) in the Sonoran Desert, Tucson, Arizona

Tom Vezo / Yellow-rumped Warbler (Setophaga coronata) female, Tucson, Arizona

Tom Vezo / Brown-crested Flycatcher (Myiarchus tyrannulus), Santa Rita Mountains, Arizona

Doug Wechsler / Night snake {Hypsiglena torquata} Tucson, Arizona, USA

Tom Vezo / Burrowing owl at nest burrow {Athene cunicularia} Tucson, Arizona, USA