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

Suzi Eszterhas / Digger Bee (Melissodes sp) pollinating 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

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

Philippe Clement / Engelmann's prickly pear {Opuntia engelmannii / phaeacantha} showing fruit and flower, Saguaro NP, Arizona

Philippe Clement / Engelmann's prickly pear {Opuntia engelmannii / phaeacantha} showing fruit and flower, Saguaro NP, Arizona

Philippe Clement / Engelmann's prickly pear {Opuntia engelmannii / phaeacantha} Saguaro NP, Arizona

Philippe Clement / Engelmann's prickly pear {Opuntia engelmannii / phaeacantha}, Saguaro NP, Arizona

Philippe Clement / Engelmann's prickly pear {Opuntia engelmannii} and Saguaro cactus {Carnegiea gigantea}, Organ Pipe Cactus National Monument, Arizona, USA

Philippe Clement / Engelmann's prickly pear {Opuntia engelmannii}, Organ Pipe Cactus National Monument, Arizona, USA May 2007

Philippe Clement / Staghorn cholla {Cylindropuntia / Opuntia versicolor}, Engelmann's prickly pear {Opuntia engelmannii} and other cacti species, Saguaro NP, Arizona, USA

Konrad Wothe / Engelmann Prickly Pear (Opuntia engelmannii) showing flower buds, Sonora Desert, North America