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.

Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei) and Boojum tree (Fouquieria columnaris) in Sonoran Desert, rainbow in background. Catavina, Valle de los Cirios Reserve, Baja California, Mexico.

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 / Backlit silver cholla cactus (Cylindropuntia echinocarpa) surrounded by California poppies (Eschscholzia californica), beneath the eroded boulders that define the park. Joshua Tree National Park, Moja...

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

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 / Desert agave (Agave deserti) has skewered a ball of spines shed by neighboring Cholla cactus (Cylindropuntia bigelovii) Anza-Borrego State Park, California, USA March

Chris Mattison / Stigma and anthers of Cactus flower (Notocactus crassigibbus). Cultivated plant. Focus-stacked image.

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 / Night blooming birdcage evening primrose (Oenothera deltoides) with the Sheep Hole Mountains in the background at sunset, BLM (Bureau of Land Management) land, Mojave Desert, California. March 2014.

Jack Dykinga / Cardon cactus (Pachycereus pringlei) and Biznaga/Barrel cactus (Ferocactus diguetii),growing at the edge of the sea, CONANP protected area.Catalina Island, Sea of Cortez, Baja Sur, Mexico. February 20...

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

Rolf Nussbaumer / Northern mockingbird (Mimus polyglottos) adult fighting with Golden-fronted Woodpecker (Melanerpes aurifrons) female over Texas Prickly Pear Cactus (Opuntia lindheimeri) Dinero, Lake Corpus Christi, S...

John Abbott / Giant prickly pear cactus (Opuntia echios var. gigantea) amongst carpetweed, Plazas Island, Galapagos

Floris van Breugel / Cholla cactus (Opuntia) backlit by setting sun, Anza Borrego State Park. California, USA. April 2009.

Rolf Nussbaumer / Texas horse crippler cactus (Echinocactus texensis) in flower, Coastal Bend, Texas Coast, USA

Patricio Robles Gil / Barrel cactus (Ferocactus pilosus) Chihuahuan desert, Mexico

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