Edwin Giesbers / Portrait of female Adder (Vipera berus) in long grass, the Netherlands

David Shale / Fangtooth (Anoplogaster cornuta) portrait, Mid-Atlantic Ridge, North Atlantic Ocean

Niall Benvie / MYN / Adder (Vipera berus) portrait, Kent, England, June

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

Solvin Zankl / Dwarf puff adder / Peringueys Sidewinding Adder (Bitis peringueyi) moving over the loose sand in typical mode of locomotion, Namib desert, Namibia)

Solvin Zankl / Dwarf puff adder / Peringueys Sidewinding Adder (Bitis peringueyi) hidden in sand of Namib desert, Namibia

Solvin Zankl / Dwarf puff adder / Peringueys Sidewinding Adder (Bitis peringueyi) moving over the loose sand in typical mode of locomotion, Namib desert, Namibia

Solvin Zankl / Dwarf puff adder / Peringueys sidewinding adder (Bitis peringueyi) camouflaged against sand, Namib desert, Namibia

David Shale / Fang Tooth {Anoplogaster cornuta} close-up of head showing teeth, from the Mid-Atlantic Ridge, 2600m

Tony Phelps / Adder (Vipera berus) female with newborn baby, Surrey UK, April 2008

Tony Phelps / Adder (Vipera berus) female and new born baby, Surrey UK, April 2008

Tony Phelps / Adder (Vipera berus) adult female with new born baby, Surrey, UK, April 2008