Daniel Heuclin / Llama (Lama glama) Laguna colorada. Altiplano, Bolivia.

Daniel Heuclin / Llama (Lama glama) herd, Laguna colorada. Altiplano, Bolivia.

Daniel Heuclin / Horned viper (Vipera ammodytes) in natural setting, Turkey.

Daniel Heuclin / Vicuna (Vicugna vicugna), five running across salt flat with mountain in background. Salar de Ascotan, Chile. September 2018.

Daniel Heuclin / Andean fox (Lycalopex culpaeus) walking in the Altiplano, Andes, Bolivia. September 2018.

Daniel Heuclin / Whistling heron (Syrigma sibilatrix sibilatrix), southern subspecies, native to Bolivia. Captive.

Daniel Heuclin / Sunda island pitviper (Trimeresurus insularis) in tree, Komodo Island.

Daniel Heuclin / Blue iguana (Cyclura lewisi) captive, endangered species occurs in Cayman Islands.

Daniel Heuclin / Western diamondback rattlesnake (Crotalus atrox) tasting air, in habitat, Arizona, USA, October. Controlled conditions

Daniel Heuclin / Red coachwip or Red racer (Masticophis flagellum piceus) eating Sceloporus lizard, Catalina foothill, Arizona, June.

Daniel Heuclin / Mojave rattlesnake (Crotalus scutulatus) Mojave desert, California, June.

Daniel Heuclin / Rhinoceros viper (Bitis nasicornis), from Central Africa, captive, July.