Cyril Ruoso / Verreaux's sifakas (Propithecus verreauxi) in Madagascar ocotillo (Alluaudia procera) trees Berenty, Madagascar.

Jack Dykinga / Yellow paloverde (Cercidium microphyllum) flowering amongst Saguaro (Carnegiea gigantea). In foothills on north side of Santa Catalina Mountains, Coronado National Forest, Arizona, USA. May 2019.

Jack Dykinga / Great horned owl (Bubo virginianus) chicks in nest in Saguaro cactus (Carnegiea gigantea), Santa Catalina Mountains, Arizona, USA, May.

Rolf Nussbaumer / Night-blooming cereus cactus (Acanthocereus tetragonus), flower bud opening at night, Texas, USA. Sequence 7 of 7. August

Rolf Nussbaumer / Night-blooming cereus cactus (Acanthocereus tetragonus), flower bud opening at night, Texas, USA. Sequence 3 of 7 August

Rolf Nussbaumer / Night-blooming cereus cactus (Acanthocereus tetragonus), flower bud opening at night, Texas, USA. Sequence 1 of 7. August

Cyril Ruoso / Prickly pear cactus (Opuntia lindheimeri) thorns, South Texas, USA, April.

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

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

Claudio Contreras / Valley of Mexican giant cardon cactuses (Pachycereus pringlei). Santa Catalina Island, Loreto Bay National Park, Sea of Cortez, Mexico. May.

Claudio Contreras / Santa Catalina Island leaf-toed gecko (Phyllodactylus bugastrolepis) in front of Mexican giant cardon cactuses (Pachycereus pringlei). Santa Catalina Island, Loreto Bay National Park, Sea of Cortez...

Claudio Contreras / Santa Catalina Island leaf-toed gecko (Phyllodactylus bugastrolepis) in front of Mexican giant cardon cactuses (Pachycereus pringlei). Santa Catalina Island, Loreto Bay National Park, Sea of Cortez...