Jack Dykinga / Ironwood Forest National Monument, Arizona. Sunset light with whispy clouds over Ragged Top Mountain in the Silverbell range.

Jeff Foott / Mexican giant cardon cactus (Pachycereus pringlei) and Boojum tree (Fouquieria columnaris) in Sonoran Desert, rainbow in background. Catavina, Valle de los Cirios Reserve, Baja California, Mexico.

Claudio Contreras / Catalina Desert Iguana (Dipsosaurus catalinensis), Catalina (Santa Catalina) Island, Loreto Bay National Park, Gulf of California (Sea of Cortez), Baja California, Mexico, May, Second place in Visions...

Claudio Contreras / Prickly pear (Opuntia sp.) growing on coastline, Socorro Island, Revillagigedo Archipelago National Park (Socorro Islands), Pacific Ocean, Western Mexico, November, Honorary Mention in the third natio...

Mark MacEwen / Octopus tree (Didiera madagascariensis), Spiny Forest, Berenty, Madagascar

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 / Notch-leaf scorpion-weed (Phacelia crenulata) blooming around Desert agave (Agave desertii) in Glorieta Canyon, Anza-Borrego State Park, California, USA, March 2017. These plants are flowering during...

Jack Dykinga / Notch-leaf scorpion-weed (Phacelia crenulata) blooming around Desert agave (Agave desertii) in Glorieta Canyon, Anza-Borrego State Park, California, USA, March 2017. These plants are flowering during...

Floris van Breugel / Barrel cacti (Ferocactus pilosus) and Ocotillo overlook Palm oasis at sunrise, Anza-Borrego Desert State Park, California, USA March

Floris van Breugel / Ocotillo (Fouquieria splendens) in morning sun, Anza-Borrego State Park, California, USA February

Tony Phelps / Parachute daisies (Ursinia anthemoides) Little Karoo, Western Cape, South Africa.

Chris Mattison / Close up of succulent plant (Peperomia columella) cultivated plant form Peru. Focus-stacked image.

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

Cyril Ruoso / Queen of the Andes (Puya raymondii) Cordillera Blanca Massif, Andes, Peru, November.

Cyril Ruoso / Giant humming bird (Patagona gigas) feeding from Queen of the Andes (Puya raymondii) flowers, Cordillera Blanca Massif, Andes, Peru, November.

Jack Dykinga / Lightning storm with rainbow over Saguaro cactus (Carnegiea gigantea) Avra Valley, Saguaro National Park, Tucson Mountains, Arizona, USA, August 2015. Long exposure with lightning trigger.

Enrique Lopez-Tapia / Giant lobelia (Lobelia rhynchopetalum) flower spikes in mist, Sanetti Plateau, Bale Mountains National Park. Ethiopia, November 2014

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) in flower at night, with The Milky Way behind, Sonoran Desert National Monument, Sierra Estrella Mountain Wilderness, Arizona, USA, May.

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) in flower at night, with The Milky Way behind, Sonoran Desert National Monument, Sierra Estrella Mountain Wilderness, Arizona, USA, May.

Jack Dykinga / Great horned owl (Bubo virginianus) chicks nesting in saguaro cactus (Carnegiea gigantea), near Oracle, Sonoran Desert, Arizona, USA, May.

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

Jack Dykinga / Low angle view of Saguaro cactus (Carnegiea gigantea) with twisted lowered arms drooping to the ground, a result of frost damage. Honey Bee Canyon, Oro Valley, Arizona, USA. February.

David Noton / Hottentot fig (Carpobrotus edulis) on the cliff at Lizard Point, the most southerly point in mainland Britain, Cornwall, England, UK. November 2011.

Neil Lucas / Boojum tree (Fouquieria columnaris) Catavina, Baja, Mexico

Nick Garbutt / Giant Pachypodium species photographed from the inside. Lake Tsimanampetsotsa National Park, South West Madagascar.

Wild Wonders of Europe / Benvie / Mountain houseleek (Sempervivum montanum) close-up of two flowers, Fliess, Naturpark Kaunergrat, Tirol, Austria, July 2008 WWE OUTDOOR EXHIBITION.

Wild Wonders of Europe / Lilja / Hottentot fig (Carpobrotus edulis) in flower with a church in the background, Pachia Ammos, Crete, Greece, April 2009

Wild Wonders of Europe / Relanzón / Ice plant (Mesembryanthemum crystallinum) flower, North Lanzarote, Canary Islands, Spain, March 2009

Wild Wonders of Europe / Relanzón / Bejeque (Aeonium / Greenovia diplocyla) in flower, La Palma, Canary Islands, Spain, March 2009

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

Wild Wonders of Europe / Benvie / Mountain houseleeks (Sempervivum montanum) in flower, Fliess, Naturpark Kaunergrat, Tirol, Austria, July 2008

Tony Phelps / Puff adder (Bitis arietans) juvenile amongst succulent plants in karoo habitat, Little Karoo, South Africa

Jack Dykinga / Boojum tree {Fouquieria / Idria columnaris} and Cardon cactus {Pachycereus pringlei} silhouette at dawn with crescent moon, Catavinia, Baja California, Mexico

Piotr Naskrecki / Katydid (Hetrodes pupus) on succulent, Cederberg, Western Cape, South Africa

Piotr Naskrecki / Vegetation of the succulent karoo habitat, Goegap Nature Reserve, South Africa

Piotr Naskrecki / Geophyte plant in succulent karoo habitat, Richtersveld, Northern Cape, South Africa

Marie Lochman / Dunna dunna (Lawrencia helmsii) succulent shrub growing in arid ground, Western Australia.

Chris Mattison / Living stone (Lithops lesliei) in cultivation with bud appearing, South Africa.

Konrad Wothe / Cobweb houseleek (Sempervivum arachnoideum) in flower, Grisons, Switzerland, Europe. July.

Ugo Mellone / Suaeda sp. beside a salty desert pond, Reg Labyad, Southern Morocco, Africa.

Ugo Mellone / Euphorbia officinarum growing from rocks in the Sahara desert, Djebel Ouarkziz, Southern Morocco, Africa.

Jack Dykinga / Trichocereus cactus (ornamental, native from South America) in flower in response to monsoon rain, Tucson, Arizona, USA.

Jack Dykinga / Cracked skin of Prickly pear cactus (Opuntia sp.) due to the ongoing drought, Santa Cataling foothills, Arizona, USA.

Jack Dykinga / White-Winged dove (Zenaida asiatica) perched on Cholla cactus (Cylindropuntia sp.) skeleton, Catalina Mountain foothills, Arizona, USA.

Jack Dykinga / White-Winged dove (Zenaida asiatica) perched atop Cholla cactus (Cylindropuntia sp.) skeleton, Catalina Mountain foothills, Arizona, USA.

John Cancalosi / Adult male Gilded flicker (Colaptes chrysoides) perched on Saguaro cactus (Carnegiea gigantea) in bloom, Sonoran desert, Arizona.

John Cancalosi / Gila woodpecker (Melanerpes uropygialis) flying from nest in Saguaro cactus (Carnegiea gigantea), Sonoran desert, Arizona.

John Cancalosi / Gilded flicker (Colaptes chrysoides) flying to feed on nectar from Saguaro blossoms (Carnegiea gigantea), Sonoran desert, Arizona.