Peter Cairns / Calcified trees at Tangled Creek in winter, Yellowstone National Park, Wyoming, USA, February 2013.

John Cancalosi / Desert Cottontail (Sylvilagus auduboni) drinking from a temporary pool of water, Sonoran Desert, Arizona

John Cancalosi / Male Costa's Hummingbird (Calypte costae) Sonoran Desert, Arizona, USA, captive

John Cancalosi / Hedgehog Cactus (Echinocereus spp.), Sonoran Desert, Arizona, USA

John Cancalosi / Portrait of Northern cardinal (Cardinalis cardinalis) male perched on branch, AZ, USA

John Cancalosi / Portrait of Mourning dove (Zenaida macroura), Sonoran Desert, AZ, USA