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...

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...