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

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.

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 / 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 Pattyn / Stormy coastal landscape with heavy rainfall approaching the coast in very windy conditions with cacti at the edge of the beach, Marao peninsula, Bahia, Brazil, August 2010

Jack Dykinga / Twisted and emerging limbs of Saguaro cacti (Carnegiea gigantea) Sonoran Desert near Tucson, Arizona, USA

Rolf Nussbaumer / Northern mockingbird (Mimus polyglottos) adult fighting with Golden-fronted Woodpecker (Melanerpes aurifrons) female over Texas Prickly Pear Cactus (Opuntia lindheimeri) Dinero, Lake Corpus Christi, S...

John Abbott / Giant prickly pear cactus (Opuntia echios var. gigantea) amongst carpetweed, Plazas Island, Galapagos

Rolf Nussbaumer / Eastern Cottontail (Sylvilagus floridanus) adult. Laredo, Webb County, South Texas, USA, April.