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

Claudio Contreras / Sonoran Desert with Teddy-bear cholla (Cylindropuntia bigelovii), Saguaro (Carnegiea gigantea) and Brittlebush (Encelia farinosa). El Colorado volcano in background. El Pinacate Biosphere Reserve, nor...

Claudio Contreras / Sonoran Desert with Saguaro (Carnegiea gigantea) and Teddy-bear Cholla (Cylindropuntia bigelovii) cactic, alongside Ocotillo (Fouquieria splendens). El Pinacate Biosphere Reserve, Sonoran Desert, nort...

Claudio Contreras / Sonoran Desert on volcanic soil with Teddy-bear cholla (Cylindropuntia bigelovii), Saguaro (Carnegiea gigantea) and ocotillo (Fouquieria splendens). El Tecolote volcano, El Pinacate Biosphere Reserve,...

John Cancalosi / Saguaro cactus (Carnegiea gigantea) and Prickly pear cactus (Opuntia) Sonoran Desert, Arizona, USA.

Cyril Ruoso / Engelmann Prickly Pear (Opuntia engelmannii) cactus in rain, southern Texas

Cyril Ruoso / Engelmann Prickly Pear (Opuntia engelmannii) cactus blooming at night, southern Texas

Cyril Ruoso / Engelmann Prickly Pear (Opuntia engelmannii) cactus flower buds, southern Texas

Cyril Ruoso / Ant (Formicidae) on Engelmann Prickly Pear (Opuntia engelmannii) cactus, southern Texas

Cyril Ruoso / Ant (Formicidae) on Engelmann Prickly Pear (Opuntia engelmannii) cactus, southern Texas

Suzi Eszterhas / Texas Flower Scarab (Trichiotinus texanus) on Engelmann Prickly Pear (Opuntia engelmannii) flower, Red Corral Ranch, Texas

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