Fabio Pupin / Horned adder, (Bitis caudalis), Namib desert, Namibia, February . Non-ex.

Fabio Pupin / Horned adder, (Bitis caudalis), Namib desert, Namibia, February . Non-ex.

Emanuele Biggi / Many horned adder (Bitis cornuta), adult individual. Swakopmund, Dorob National Park, Namibia. Captive.

Emanuele Biggi / Horned adder (Bitis caudalis) portrait of a male, Brandberg, Namibia

Emanuele Biggi / Horned adder (Bitis caudalis) portrait of a male individual, Namibia

Lucas Bustamante / Horned adder (Bitis caudalis) eyes and horns, Swakopmund, Erongo, Namibia.

Lucas Bustamante / Horned adder (Bitis caudalis) curled up, Swakopmund, Erongo, Namibia.

Emanuele Biggi / Horned adder (Bitis caudalis) close up of eye, Brandberg area, Namibia

Emanuele Biggi / Horned adder (Bitis caudalis) waiting for passing prey in the Namib Desert, Brandberg, Namibia

Lucas Bustamante / Horned Adder (Bitis caudalis) eye peering from sand, Swakopmund, Erongo, Namibia.

Lucas Bustamante / Many horned adder (Bitis cornuta) close up detail of eye, Swakopmund, Erongo, Namibia.

Lucas Bustamante / Horned adder (Bitis caudalis) Swakopmund, Erongo, Namibia .

Jen Guyton / Horned adder (Bitis caudalis) camouflaged in iron-rich sand in the Kalahari Desert, South Africa.

Emanuele Biggi / Horned adder (Bitis caudalis) camouflaged in its environment, Namib Naukluft National Park, Namibia June

Emanuele Biggi / Horned adder (Bitis caudalis) camouflaged in its environment, Namib Naukluft National Park, Namibia June

Emanuele Biggi / Horned adder (Bitis caudalis) camouflaged in its environment, Namib Naukluft National Park, Namibia

Emanuele Biggi / Horned adder (Bitis caudalis) camouflaged in its environment, Namib Naukluft National Park, Namibia

Emanuele Biggi / Horned adder (Bitis caudalis) camouflaged in its environment, Namib Naukluft National Park, Namibia

Emanuele Biggi / Horned adder (Bitis caudalis) camouflaged in its environment, Namib Naukluft National Park, Namibia

Emanuele Biggi / Horned adder (Bitis caudalis) camouflaged in its environment, Namib Naukluft National Park, Namibia

Emanuele Biggi / Horned adder (Bitis caudalis) camouflaged in its environment, Namib Naukluft National Park, Namibia

Chris Mattison / Many horned adder (Bitis cornuta) curled up, taken on white background, Springbok, South Africa.

Chris Mattison / Many-horned adder (Bitis cornuta) curled up, taken against white background, Port Nolloth, South Africa.

Chris Mattison / Many-horned / Horned Puff Adder (Bitis cornuta). Springbok, South Africa, October.

Chris Mattison / Many-horned Adder (Bitis cornuta) curled up. Springbok, Northern Cape, South Africa.

Chris Mattison / Many-horned / Horned Puff Adder (Bitis cornuta). Port Nolloth, South Africa, October.

Chris Mattison / Many-horned / Horned Puff Adder (Bitis cornuta). Port Nolloth, South Africa, October.

Tony Phelps / Horned puff / Many horned adder {Bitis cornuta} Western Cape, South Africa

Michael & Patricia Fogden / Many-horned Adder (Bitis cornuta) portrait of venomous snake, native to Africa