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.

Jack Dykinga / Horseshoe Bend of the Salt River with Saguaro cacti (Carnegiea gigantea), Arizona, USA.

Jack Dykinga / Saguaro cacti (Carnegiea gigantea) Cabeza Prieta National Wildlife Refuge, Arizona, USA.

Jack Dykinga / Saguaro cacti (Carnegia gigantea) at sunset, during a summer rain storm. Saguaro National Park, Sonoran Desert, Arizona, USA, August. Digital composite.

Jack Dykinga / Border wall with razor wire at the Mexican / United States border in Arizona, where the newer taller sections of the border wall pushed by President Trump are being erected in the environmentally sens...

Jack Dykinga / Yellow paloverde (Cercidium microphyllum) flowering amongst Saguaro (Carnegiea gigantea). In foothills on north side of Santa Catalina Mountains, Coronado National Forest, Arizona, USA. May 2019.

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

Jack Dykinga / Twisted Saguaro cactus (Carnegiea gigantea) with the Milky Way and distant glow of Phoenix lights, Sonoran Desert National Monument, South Maricopa Mountains Wilderness, Arizona, USA. September 2017.

Jack Dykinga / Saguaro (Carnegiea gigantea) cacti at night with the Milky Way . Desert National Monument, Arizona, USA, September.

Jack Dykinga / ARCHIVED SG - Duplicate 10/10/2017. Saguaro cactus (Carnegiea gigantea) at sunset, with drooping frost damaged limbs, South Maricopa Mountains Wilderness, Sonoran Desert National Monument, Arizona...

Jack Dykinga / Saguaro cacti (Carnegiea gigantea) in bloom with Foothill paloverde (Cercidium microphyllum) Sonoran Desert National Monument, Arizona, USA, April.

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 / Saguaro cactus (Carnegiea gigantea) in flower at night, with The Milky Way behind, Sonoran Desert National Monument, Sierra Estrella Mountain Wilderness, Arizona, USA, May.

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) in flower at night, with The Milky Way behind, Sonoran Desert National Monument, Sierra Estrella Mountain Wilderness, Arizona, USA, May.

Jack Dykinga / Great horned owl (Bubo virginianus) chicks nesting in saguaro cactus (Carnegiea gigantea), near Oracle, Sonoran Desert, Arizona, USA, May.

Jack Dykinga / Great horned owl (Bubo virginianus) chick nesting in Saguaro cactus (Carnegiea gigantea), Santa Catalina Mountains, Arizona, USA, May.

Jack Dykinga / Great horned owl (Bubo virginianus) chicks in nest in Saguaro cactus (Carnegiea gigantea) at sunset, Santa Catalina Mountains, Arizona, USA, May.

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

Jack Dykinga / Low angle view of Saguaro cactus (Carnegiea gigantea) with twisted lowered arms drooping to the ground, a result of frost damage. Honey Bee Canyon, Oro Valley, Arizona, USA. February.

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

Jack Dykinga / Sunset light on twisted Saguaro cactus (Carnegiea gigantea) Sonoran Desert National Monument, Arizona, USA, April.

Jack Dykinga / Saguaro Cactus (Carnegiea gigantea) against summer monsoon sky with rainbow and streaks of lightning. Sonoran Desert, near Tucson, Arizona, August 2012.

Jack Dykinga / Twisted and emerging limbs of Saguaro cacti (Carnegiea gigantea) Sonoran Desert near 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 cacti (Carnegiea gigantea) at sunset in the foothills of the Santa Catalina Mountains, near the Sutherland Wash, Catalina State Park, Arizona, USA

Jack Dykinga / Rainbow at sunset over desert hillside with Saguaro cacti, Table Mountain in the distance, Pusch Ridge Wilderness, Coronado National Forest, Santa Catalina Mountains, Arizona, USA

Jack Dykinga / Penstemon (Penstemon sp) in flower against Saguaro cactus (Carnegiea gigantea) Finger Rock Canyon, Santa Catalina Mountains, Arizona, USA

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) twisted by exposure to frost, Maricopa Mountains Wilderness, Sonoran Desert National Monument, Arizona, USA

Jack Dykinga / Saguaro cacti (Carnegiea gigantea) silhouetted at sunrise, Sand Tank Mountains, Sonoran Desert National Monument, Arizona, USA

Jack Dykinga / Saguaro cactus (Carnegia gigantea) lit up at night with star trails, Cabeza Prieta National Wildlife Refuge, Arizona, USA

Jack Dykinga / California poppies (Eschscholzia californica) flowering between the "ribs" of a dead Saguaro cactus (Carnegiea gigantea) Barry M. Goldwater Range, Arizona, USA

Jack Dykinga / Close-up of spines of the trunk of a Saguaro cactus (Carnegiea gigantea) Caboza Prieta National Wildlife Refuge, Arizona, USA

Jack Dykinga / Saguaro cacti (Carnegiea gigantea) Sand Tank Mountains, Barry M. Goldwater Range, Arizona, USA

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

Philippe Clement / Saguaro cactus {Carnegiea gigantea}, Organ Pipe Cactus National Monument, Arizona, USA

Philippe Clement / Saguaro cactus {Carnegiea gigantea} showing fruit, Organ Pipe Cactus National Monument, Arizona, USA May 2007

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

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

Jack Dykinga / Saguaro Cactus (Carnegiea gigantea) with new arm emerging from its trunk, Cabeza Prieta NW Refuge, Arizona, USA

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

Jack Dykinga / Night sky with trails of stars rotating around the North Star with a Saguaro Cactus (Carnegiea gigantea) silhouetted in the foreground, Cabeza Prieta NW Refuge, Arizona, USA

Jack Dykinga / Saguaro Cacti (Carnegiea gigantea) at sunrise, Sonoran Desert National Monument, Arizona, USA

Jack Dykinga / Saguaro Cacti (Carnegiea gigantea) at sunrise, Cabeza Prieta NW Refuge, Sonoran Desert, 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) silhouetted against the sunset in the Silver Bell Mountains, Saguaro NP, Arizona, USA