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 / 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 / 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 / Rainbow over Table Mountain and the Pusch Ridge Wilderness in the Santa Catalina Mountains, Arizona

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

Jouan Rius / Rainbow over Saguaro cacti (Carnegiea gigantea), Organ Pipe Cactus (Stenocereus thurberi) and Foothills Palo Verde tree (Cercidium microphyllum), Organ Pipe Cactus National Monument, Sonoran Desert, A...

Tom Vezo / Rainbow cactus flowering {Echinocereus pectinatus} Arizona, USA.

Tom Vezo / Rainbow Cactus (Echinocereus pectinatus) in bloom, San Rafael grasslands, Arizona

Claudio Contreras / Rainbow hedgehog cactus (Echinocereus rigidissimus) close up, Los Ojos Ranch, Sonora, Mexico.

Jack Dykinga / Saguaro cacti (Carnegiea gigantea) in desert with lightning and a violent, summer monsoon storm cell lighting the desert with electricity and a partial rainbow, State Trust land, Tucson, Arizona, USA....

Jack Dykinga / Saguaro cacti (Carnegiea gigantea), flowering Scorpionweeds (Phacelia crenulata) and Teddy bear cholla cacti (Opuntia bigelovii) in afternoon sunlight under rainbow and stormy skies, Sonoran Desert Na...

Jack Dykinga / Harris's hawks (Parabuteo unicinctus) pair, nesting at top of Saguaro cactus (Carnegiea gigantea) with rainbow in stormy sky above, Sonoran Desert, BLM land near Oracle, Arizona , USA. July.

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