Jack Dykinga / White flowering birdcage evening primrose (Oenothera deltoides) and yellow evening primrose (Oenothera primiveris), Cabeza Prieta National Wildlife Refuge, Arizona. February 2014.

Jack Dykinga / Birdcage evening primrose (Oenothera deltoides) and Desert sand verbena (Abronia villosa) flowering in desert, Pinta Sands, Sierra Pinta Mountains, Cabeza Prieta National Wildlife Refuge, Arizona, USA

Jack Dykinga / Birdcage evening primrose (Oenothera deltoides) and Desert sand verbena (Abronia villosa) flowering in desert, Pinta Sands, Sierra Pinta Mountains, Cabeza Prieta National Wildlife Refuge, Arizona, USA

Jack Dykinga / Ocotillo cactus (Fouquieria splendens) in desert landscape strewn with rod lava rock, Cabeza Prieta Mountains in the distance, dawn, Cabeza Prieta National Wildlife Refuge, Arizona, USA

Jack Dykinga / Saguaro cactus (Carnegia gigantea) lit up at night with star trails, Cabeza Prieta National Wildlife Refuge, Arizona, USA

Jack Dykinga / Trunks of Saguaro Cacti (Carnegiea gigantea) at sunrise, Cabeza Prieta National Wildlife Refuge, Arizona. January 1st 2000

Jack Dykinga / Saguaro Cacti (Carnegiea gigantea) silhouetted against night sky with star trails, time exposure for 5 hours after midnight, Cabeza Prieta National Wildlife Refuge, Arizona. New Years 2000

Jack Dykinga / White flowering birdcage evening primrose (Oenothera deltoides) and Coulter's globemallow (Sphaeralcea coulteri), Cabeza Prieta National Wildlife Refuge, Arizona. February 2014.

Jack Dykinga / White flowering birdcage evening primrose (Oenothera deltoides), yellow evening primrose (Oenothera primiveris) and Coulter's globemallow (Sphaeralcea coulteri) with the Sierra Pinta Mountains in the...

Michael Durham / California leaf-nosed bat (Macrotus californicus) in flight, Copper Mountains, Cabeza Prieta National Wildlife Refuge, Sonoran Desert, Arizona, USA, July.

Michael Durham / Western Pipistrelle (Pipistrellus hesperus) bat flying, Copper Mountains, Cabeza Prieta National Wildlife Refuge, Arizona

Michael Durham / California Leaf-nosed Bat (Macrotus californicus) flying at night, Copper Mountains, Cabeza Prieta National Wildlife Refuge, Arizona

Michael Durham / California Leaf-nosed Bat (Macrotus californicus) flying at night, Copper Mountains, Cabeza Prieta National Wildlife Refuge, Arizona

Jack Dykinga / Skeleton of Teddy Bear Cholla (Opuntia bigelovii) and Saguaro Cacti (CArnegiea gigantea) at sunrise, Cabeza Prieta National Wildlife Refuge, Arizona

Jack Dykinga / Organ Pipe Cactus (Stenocereus thurberi) with Saguaro Cacti (Carnegiea gigantea) in the distance, furthest NW range of Organ Pipe Cacti, Cabeza Prieta National Wildlife Refuge, Arizona

Jack Dykinga / Vehicle tracks winding around a Cottontop Cactus (Echinocactus polycephalus), Cabeza Prieta National Wildlife Refuge, Arizona

Jack Dykinga / Saguaro {Carnegia gigantea} and Cholla cacti {Opuntia sp} Antelope Hills, Cabeza Prieta National Wildlife Refuge, Arizona, USA

Jack Dykinga / Saguaro cacti {Carnegiea gigantea} silhouetted in the sunset afterglow of Mount Pinatubo eruption in the Philippines, Cabeza Prieta National Wildlife Refuge, Arizona, USA, 1991

Jack Dykinga / Saguaro cacti {Carnegiea gigantea} silhouetted at sunset, Cabeza Prieta National Wildlife Refuge, Arizona, USA

Jack Dykinga / Saguaro cacti (Carnegiea gigantea) silhouetted against blazing sunset, Cabeza Prieta National Wildlife Refuge, Sonoran Desert, Arizona, USA

Jack Dykinga / Ocotillo (Fouquieria splenden) in flower with Brittlebush (Encelia farinosa) in desert near Tule Well, Cabeza Prieta National Wildlife Refuge, Arizona, USA. March.

Jack Dykinga / Saguaro cacti (Carnegiea gigantea) Cabeza Prieta National Wildlife Refuge, Arizona, USA.

Jack Dykinga / Saguaro (Carnegiea gigantea) cacti in Sonoran Desert, silhouetted in pre-dawn light. Cabeza Prieta National Wildlife Refuge, Arizona, USA. March 2020.

Jack Dykinga / Saguaro (Carnegiea gigantea) cacti silhouetted against morning sun. Optical phenomenon known as glory in sky caused by sun burning off ground fog. Cabeza Prieta National Wildlife Refuge, Arizona, USA....

Jack Dykinga / Saguaro cactus (Carnegiea gigantea), close up of stem weathered by harsh scalding sunlight. Cabeza Prieta National Wildlife Refuge, Arizona, USA. March.

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) with twisted arms caused by freezing weather, in Sonoran Desert with flowering Brittlebush (Encelia farinosa). Cabeza Prieta National Wildlife Refuge, Arizona, USA....

Jack Dykinga / Saguaro (Carnegiea gigantea) cacti silhouetted against morning sun. Optical phenomenon known as glory in sky caused by sun burning off ground fog. Cabeza Prieta National Wildlife Refuge, Arizona, USA....

Jack Dykinga / Saguaro (Carnegiea gigantea) cacti silhouetted against morning sun. Optical phenomenon known as glory in sky caused by sun burning off ground fog. Cabeza Prieta National Wildlife Refuge, Arizona, USA....

Jack Dykinga / Saguaro (Carnegiea gigantea), old cactus with twisted descending arms, in morning light. Cabeza Prieta National Wildlife Refuge, Arizona, USA. February 2020.

Jack Dykinga / Teddy bear cholla (Cylindropuntia bigelovii) cacti amongst Brittlebush (Encelia farinosa) flowers. Sonoran Desert in stormy morning light. Cabeza Prieta National Wildlife Refuge, Arizona, USA. March 2...

Jack Dykinga / Saguaro (Carnegiea gigantea) cacti silhouetted under Milky Way in pre-dawn light. Cabeza Prieta National Wildlife Refuge, Sonoran Desert, Arizona, USA. February 2020.

Jack Dykinga / Saguaro (Carnegiea gigantea) cacti silhouetted under Milky Way in pre-dawn light. Cabeza Prieta National Wildlife Refuge, Sonoran Desert, Arizona, USA. February 2020.

Jack Dykinga / Desert sunflower (Geraea canescens) flowering in Sonoran Desert following rain storm. Cabeza Prieta National Wildlife Refuge, Sonoran Desert, Arizona, USA. March 2020.

Jack Dykinga / Brittlebush (Encelia farinosa) with mountains in background, following rainfall. Cabeza Prieta National Wildlife Refuge, Arizona, USA. March 2020.

Jack Dykinga / Teddy bear cholla cactus (Cylindropuntia bigelovii) with Ocotillo (Fouquieria splendens) and flowering Brittlebush (Encelia farinosa) in background. Cabeza Prieta National Wildlife Refuge, Arizona, US...

Jack Dykinga / Teddy bear cholla (Cylindropuntia bigelovii) cacti and Ocotillo (Fouquieria splendens) with flowering Brittlebush (Encelia farinosa) in background, in morning light. Cabeza Prieta National Wildlife Re...

Jack Dykinga / Teddy bear cholla (Cylindropuntia bigelovii) cacti and Ocotillo (Fouquieria splendens) in morning light. Cabeza Prieta National Wildlife Refuge, Arizona, USA. March 2020.

Jack Dykinga / Sonoran Desert with Saguaro (Carnegiea gigantea), Teddy bear cholla (Cylindropuntia bigelovii), Ocotillo (Fouquieria splendens) and flowering Brittlebush (Encelia farinosa). Cabeza Prieta National Wil...

Jack Dykinga / Teddy bear cholla (Cylindropuntia bigelovii) cacti and Ocotillo (Fouquieria splendens) in morning light, flowerin Brittlebush (Encelia farinosa) in background. Cabeza Prieta National Wildlife Refuge,...