Jack Dykinga / Twisted Saguaro cactus (Carnegiea gigantea) with the Milky Way and distant glow of Phoenix lights, Sonoran Desert National Monument, South Maricopa Mountains Wilderness, Arizona, USA. September 2017.

Jack Dykinga / ARCHIVED SG - Duplicate 10/10/2017. Saguaro cactus (Carnegiea gigantea) at sunset, with drooping frost damaged limbs, South Maricopa Mountains Wilderness, Sonoran Desert National Monument, Arizona...

Jack Dykinga / Frost damaged Saguaro cactus (Carnegiea gigantea) with sunset light shining through limbs. South Maricopa Mountains Wilderness, Arizona, USA, March 2015.

Martin Dohrn / Maricopa harvester ant (Pogonomyrmex maricopa) fighting a different species of ant (Aphaenogaster cockerelli), over territory Arizona, USA

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) twisted by exposure to frost, Maricopa Mountains Wilderness, Sonoran Desert National Monument, Arizona, USA

Jack Dykinga / Saguaro Cacti (Carnegiea gigantea) in a summer storm at sunset, with a rainbow in the background, Maricopa Mountains, Sonoran Desert National Monument, Arizona, USA

Ashley Cooper / Farmers' sign about the water crisis during the 2011-17 California drought, near Bakersfield in the Central Valley, California, USA, September 2014.

Ashley Cooper / The Petroleum highway in the Midway Sunset oilfield in Maricopa, Bakersfield, California, USA. September 2014.

Jack Dykinga / Frost damaged Saguaro cactus (Carnegiea gigantea) in the South Maricopa Mountains Wilderness, Arizona, USA. January.

Jack Dykinga / Frost damaged saguaro cactus (Carnegiea gigantea) South Maricopa Mountains Wilderness, Arizona, USA, January. Finalist in the Plants and Fungi Category of the Wildlife Photographer of the Year Awards...

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) with frost damaged limbs, in the South Maricopa Mountains Wilderness, Sonoran Desert National Monument, Arizona, USA, March.

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) at sunset, with drooping frost damaged limbs, South Maricopa Mountains Wilderness, Sonoran Desert National Monument, Arizona, USA, March.

Martin Dohrn / Harvester ant (Pogonomyrmex maricopa) habitat in Arizona, August 2009

Martin Dohrn / Harvester ant (Pogonomyrmex maricopa) with feather, Arizona USA

Martin Dohrn / Maricopa harvester ant (Pogonomyrmex maricopa) fighting a Long legged ant (Aphaenogaster cockerelli), over territory Arizona, USA

Martin Dohrn / Maricopa harvester ant (Pogonomyrmex maricopa) (middle) fighting a different species of ant (Aphaenogaster sp), over territory Arizona, USA

Martin Dohrn / Maricopa harvester ant (Pogonomyrmex maricopa) (middle) fighting a different species of ant (Aphaenogaster sp), over territory Arizona, USA

Martin Dohrn / Maricopa harvester ant (Pogonomyrmex maricopa) (middle) fighting a different species of ant (Aphaenogaster sp) over territory

Martin Dohrn / Maricopa harvester ant (Pogonomyrmex maricopa) fighting a different species of ant (Aphaenogaster cockerelli), over territory Arizona, USA

Martin Dohrn / Maricopa harvester ant (Pogonomyrmex maricopa) fighting two ants of different species (Aphaenogaster cockerelli), over territory Arizona, USA

Mark Moffett / Ant (Dorymyrmex sp) workers climbing on a larger Harvester Ant (Pogonomyrmex maricopa) to lick her body clean, Portal, Arizona

Jack Dykinga / The skeletal remains of a giant Saguaro cactus (Carnegiea gigantea) in the golden light of sunset, Maricopa Mountains Wilderness, Sonoran Desert National Monument, Arizona, USA. March.

Tim Fitzharris / Grand Canyon from Maricopa Point, Grand Canyon National Park, Arizona