Jack Dykinga / Night blooming birdcage evening primrose (Oenothera deltoides) with the Sheep Hole Mountains in the background at sunset, BLM (Bureau of Land Management) land, Mojave Desert, California. March 2014.

Jack Dykinga / Cardon cactus (Pachycereus pringlei) and Biznaga/Barrel cactus (Ferocactus diguetii),growing at the edge of the sea, CONANP protected area.Catalina Island, Sea of Cortez, Baja Sur, Mexico. February 20...

Doc White / Cardon cactus (Pachycereus pringlei) in desert habitat, Baja California, Mexico.

Doc White / Cardon cactus (Pachycereus pringlei) in desert habitat, Baja California, Mexico.

Cyril Ruoso / Elephant cactus (Pachycereus pringlei) in flower with bees looking for pollen, Vizcaino Desert, Baja California, Mexico, April.

Cyril Ruoso / Black-chinned hummingbird (Archilochus alexandri) flying towards an Elephant cactus (Pachycereus pringlei) flower, Vizcaino desert, Baja California, Mexico, May.

Cyril Ruoso / Raven (Corvus corax) screaming perched on Elephant cactus (Pachycereus pringlei) Vizcaino Desert, Baja California, Mexico, May.

Cyril Ruoso / Boojum tree (Fouquieria columnaris), Elephant cactus (Pachycereus pringlei) and Datilillo (Yucca valida) silhouetted at night, Vizcaino Desert, Baja California, Mexico, May.

Cyril Ruoso / Elephant cactus (Pachycereus pringlei) with flowers open just before dawn, Vizcaino Desert, Baja California, May.

Cyril Ruoso / Male Hooded oriole (Icterus cucullatus) perched on top of Elephant cactus (Pachycereus pringlei) Vizcaino Desert, Baja California, Mexixo, May.

Cyril Ruoso / Gila woodpecker (Melanerpes uropygialys) flying from nest hole in the trunk of an Elephant cactus (Pachycereus pringlei) Vizcaino Desert, Baja California, Mexico, May.

Cyril Ruoso / Elephant cactus (Pachycereus pringlei) at night, Vizcaino Desert, Baja California, Mexico, May.