Jack Dykinga / Saguaro cacti (Carnegiea gigantea) in bloom with Foothill paloverde (Cercidium microphyllum) Sonoran Desert National Monument, Arizona, USA, April.

Martin Gabriel / Woody / Monkey ladder vine (Bauhinia glabra) Palo Verde National Park, Costa Rica

Martin Gabriel / Woody / Monkey ladder vine (Bauhinia glabra) Palo Verde National Park, Costa Rica

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.

Jouan Rius / Rainbow over Saguaro cacti (Carnegiea gigantea), Organ Pipe Cactus (Stenocereus thurberi) and Foothills Palo Verde tree (Cercidium microphyllum), Organ Pipe Cactus National Monument, Sonoran Desert, A...

Jouan Rius / Yellow or Foothills Palo Verde tree (Cercidium microphyllum), Arizona, USA. April 2014.

Nick Hawkins / Black-bellied whistling ducks (Dendrocygna autumnalis) flock in flight, Palo Verde National Park, Costa Rica.

Nick Hawkins / Black-necked stilt (Himantopus mexicanus) reflected in water, Palo Verde National Park, Costa Rica.

Nick Hawkins / Salmon-bellied racer snake (Mastigodryas melanolomus) resting on cracked mud, Palo Verde National Park, Costa Rica, April 2014.

Cyril Ruoso / Black-chinned hummingbird (Archilochus alexandri) feeding on Foothill Palo verde (Cercidium / Parkinsonia microphyllum) nectar, Vizcaino Desert, Baja California, Mexico, May.

Cyril Ruoso / Black-chinned hummingbird (Archilochus alexandri) feeding on Foothill Palo verde (Cercidium / Parkinsonia microphyllum) nectar, Vizcaino Desert, Baja California, Mexico, May.

Gabriel Rojo / Flowers of Verde olivo (Parkinsonia praecox) Lihue Calel National Park, La Pampa, Argentina