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

John Cancalosi / Great horned owl (Bubo virginianus) chick stretching its wings in nest in a Saguaro (Carnegiea gigantea), is groomed by its parent, Sonoran Desert, Arizona, USA, May.

Tim Fitzharris / Wildflowers and cacti, Caprock Canyons State Park, Texas

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

Donald M. Jones / Curve-billed Thrasher (Toxostoma curvirostre) feeding on cactus flower nectar, southern Arizona

Donald M. Jones / Curve-billed Thrasher (Toxostoma curvirostre) pair, southern Arizona

Donald M. Jones / Cactus Wren (Campylorhynchus brunneicapillus) calling, southwestern Arizona