Daniel Heuclin / Baja California ratsnake (Bogertophis rosaliae) with tongue out tasting the air, Opuntia cactus behind. Baja California, Mexico,

Daniel Heuclin / Western diamondback rattlesnake (Crotalus atrox) coiled on itself, flicking tongue, Organ pipe cactus NP, Arizona, USA. Controlled conditions.

Suzi Eszterhas / Digger Bee (Melissodes sp) pollinating Engelmann Prickly Pear (Opuntia engelmannii)flower, Red Corral Ranch, Texas

Rolf Nussbaumer / Ruby-throated Hummingbird {Archilochus colubris} male flying to feed on Texas Prickly Pear Cactus flower (Opuntia lindheimeri) Hill Country, Texas, USA

Jack Dykinga / Prickly pear cactus (Opuntia engelmannii) with flowering Globemallow (Sphaeralcea ambigua.) close up, Ironwood Forest National Monument, Sonoran Desert, Arizona, USA. March, 2023.

Jack Dykinga / Prickly pear cactus (Opuntia engelmannii) and flowering Globemallow (Sphaeralcea ambigua.) on desert floor, Ironwood Forest National Monument, Sonoran Desert, Arizona, USA. March.

Jack Dykinga / Globemallow (Sphaeralcea ambigua.) flowering across desert floor with Teddy bear cholla (Opuntia bigelovii), Saguaro cacti (Carnegiea gigantea) and Prickly pear cactus (Opuntia engelmannii), Ironwood...

Jack Dykinga / Prickly pear cactus (Opuntia engelmannii) surrounded by carpet of flowering Globemallow (Sphaeralcea ambigua), Ironwood Forest National Monument, Sonoran Desert, Arizona, USA. March.

Jack Dykinga / Prickly pear cactus (Opuntia engelmannii) that is drought stressed as well as having been gnawed at by rodents that need the moisture. In the background, a young Saguaro cactus (Carnegiea gigantea) wi...

Jack Dykinga / Prickly pear cactus (Opuntia engelmannii) that is drought stressed as well as having been gnawed at by rodents that need the moisture. In the background, a young Saguaro cactus (Carnegiea gigantea) wi...

Jack Dykinga / Santa Catalina Mountains with a drought-stricken Giant saguaro cactus (Carnegiea gigantea). The foreground was previously covered with Prickly pear cacti (Opuntia engelmannii) before the drought, Cata...

Jack Dykinga / Drought stressed and dying Prickly pear cacti (Opuntia engelmannii), in the Tucson Mountains at evening light, Saguaro National Park, Arizona, USA. January 2021.

Jack Dykinga / Drought stressed and dying Prickly pear cacti (Opuntia engelmannii) next to a deeply furrowed, young Giant saguaro cactus (Carnegiea gigantea), Tucson Mountains at evening light, Saguaro National Park...

Jack Dykinga / Drought stressed and dying Prickly pear cacti (Opuntia engelmannii), in the Tucson Mountains at evening light, Saguaro National Park, Arizona, USA. January 2021.

Jack Dykinga / Santa Catalina Mountains at sunset after a storm with snow, Giant saguaro cactus (Carnegiea gigantea), Prickly pear cacti (Opuntia engelmannii) and grasses, Catalina State Park, Sonoran Desert, Arizon...

Jack Dykinga / Drought stressed and dying Prickly pear cacti (Opuntia engelmannii), in the Tucson Mountains at evening light, Saguaro National Park, Arizona, USA. January 2021.

Frederique Olivier / Timelapse of an Engelmann's prickly pear (Opuntia Engelmannii) flowering, Castle Valley, Utah, USA, 2018

Frederique Olivier / Timelapse of Engelmann's prickly pear (Opuntia Engelmannii) flower opening,Castle Valley, Utah, USA.

Frederique Olivier / Timelapse of Engelmann's prickly pear (Opuntia Engelmannii) flowering, Castle Valley, Utah, USA, 2018

Frederique Olivier / Timelapse of Engelmann's prickly pear (Opuntia Engelmannii) flowering, with Castleton Tower in the background, Castle Valley, Utah, USA, 2018

Frederique Olivier / Timelapse of Engelmann's prickly pear (Opuntia Engelmannii) flowering, Castle Valley, Utah, USA, 2018