Pete Oxford / Puff Adder (Bitis arietans) near wetland, Marakele National Park, Limpopo, South Africa

Tony Phelps / Puff adder (Bitis arietans) moving into ambush position under a bush, DeHoop Nature Reserve, Western Cape, South Africa, January.

Pete Oxford / Snake charmer's Egyptian cobra (Naja haje) and African puff-adder (Bitis arietans arietans) Djemaa el-Fna (the square), Marrakech, Morocco, June 2009

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

Jabruson / Close up of skin of Puff adder {Bitis arietans} Tsavo East NP, Kenya

Tony Phelps / Extracting venom from Puff adder {Bitis arietans} at Liverpool school of tropical medicine, UK

Ann & Steve Toon / Puff adder (Bitis arietans), Zimanga game reserve, KwaZulu-Natal, South Africa.

Pete Oxford / Puff Adder (Bitis arietans), Marakele National Park, Limpopo, South Africa

Pete Oxford / Puff Adder (Bitis arietans) camouflaged in leaves, Marakele National Park, Limpopo, South Africa

Tony Phelps / Puff adder (Bitis arietans) entering a hole in a wall, seen from inside, De Hoop Nature Reserve, Western Cape, South Africa, November.

Tony Phelps / Puff adder (Bitis arietans) entering a hole in a wall, De Hoop Nature Reserve, Western Cape, South Africa, September.

Jen Guyton / Puff adder (Bitis arietans) camouflaged in leaf litter, Gorongosa National Park, Mozambique.