Claudio Contreras / Jumping cholla (Cylindropuntia fulgida) cactus branches hanging down, view of Sonoran Desert and Montezuma's Head Mountain and the Ajo Range. Organ Pipe Cactus National Monument, Arizona, USA. Jan...

Claudio Contreras / Jumping cholla (Cylindropuntia fulgida fulgida), Rasa Island Special Biosphere Reserve, Sea of Cortez (Gulf of California), Mexico, April

Jouan Rius / Chain-fruit or Jumping cholla (Cylindropuntia fulgida), Organ Pipe Cactus National Monument, Sonoran Desert, Arizona, USA, April.

Jouan Rius / Chain-fruit or Jumping cholla (Cylindropuntia fulgida) silhouetted at sunset, Saguaro National Park, Arizona, USA, April.

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...

Philippe Clement / Chain fruit / Jumping cholla (Opuntia / Cylindropuntia fulgida) fruit. Organ Pipe Cactus National Monument, Arizona, USA

Philippe Clement / Chain fruit / Jumping cholla (Opuntia / Cylindropuntia fulgida) fruit being removed from shoe of hiker. Organ Pipe Cactus National Monument, Arizona, USA

Philippe Clement / Chain fruit / Jumping cholla (Opuntia / Cylindropuntia fulgida) fruit being removed from shoe of hiker. Organ Pipe Cactus National Monument, Arizona, USA

Philippe Clement / Chain fruit / Jumping cholla (Opuntia / Cylindropuntia fulgida) fruit being removed from shoe of hiker. Organ Pipe Cactus National Monument, Arizona, USA

Philippe Clement / Chain fruit / Jumping cholla (Opuntia / Cylindropuntia fulgida) tree. Organ Pipe Cactus National Monument, Arizona, USA 2007

Philippe Clement / Chain fruit / Jumping cholla (Opuntia / Cylindropuntia fulgida) fruit. Organ Pipe Cactus National Monument, Arizona, USA

Philippe Clement / Chain fruit / Jumping cholla (Opuntia / Cylindropuntia fulgida) fruit. Organ Pipe Cactus National Monument, Arizona, USA

Philippe Clement / Chain fruit / Jumping cholla (Opuntia / Cylindropuntia fulgida) fruit. Organ Pipe Cactus National Monument, Arizona, USA

Philippe Clement / Cactus wren (Campylorhynchus brunneicapillus) perched on Chain fruit / Jumping cholla (Cylindropuntia fulgida). Organ Pipe Cactus National Monument, Arizona, USA

Jack Dykinga / Chain-fruit Chollas (Opuntia fulgida)(foreground) and Saguaro cacti (Carnegiea gigantea) at dawn with the Sand Tank Mountains in the background, Sonoran Desert National Park, Arizona

John Cancalosi / Purple Chain-Fruit Cholla / Jumping Cholla cactus blossom (Opuntia fulgida), Arizona, USA

Claudio Contreras / Landscape of island coast including Jumping cholla cacti (Cylindropuntia fulgida). Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Claudio Contreras / Jumping cholla cacti (Cylindropuntia fulgida) with Partida and Angel de la Guarda Islands beyond. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Claudio Contreras / Jumping cholla cacti (Cylindropuntia fulgida.) with Partida and Angel de la Guarda Islands beyond. Rasa Island Special Biosphere Reserve, Sea of Cortez, Mexico. April.

Jack Dykinga / Hedgehog cactus (Echinocereus engelmannii) lying dead amid the dead arms of a Chain chola cactus (Opuntia fulgida). The extended drought is even killing plants that are drought tolerant. Ironwood Fore...

Jack Dykinga / DELETE Stands of Chain cholla cacti (Opuntia fulgida) and Saguaro cacti (Carnegiea gigantea) with Ragged Top Mountain in the Silverbell Range dominating the horizon at sunset after a late spring storm...

Jack Dykinga / Saguaro (Carnegiea gigantea) and Chain cholla (Cylindropuntia fulgida) cacti with Rugged Top Mountain, Silverbell Range in background, at sunset. Ironwood National Monument, Arizona, USA. February 202...

Jack Dykinga / Saguaro (Carnegiea gigantea) and Chain cholla (Cylindropuntia fulgida) cacti in Sonoran Desert at sunset, mountains in background. Ironwood National Monument, Arizona, USA. March 2020.

Jack Dykinga / Chain cholla (Cylindropuntia fulgida) in Sonoran Desert in evening light, Saguaro (Carnegiea gigantea) and Ragged Top Mountain in background. Ironwood National Monument, Arizona, USA. March 2020.

Jack Dykinga / Chain cholla (Cylindropuntia fulgida) and Saguaro (Carnegiea gigantea) cacti in Sonoran Desert, at dawn. Ironwood National Monument, Arizona, USA.