Alex Hyde / Adder (Vipera berus) basking amongst bracken fronds. Peak District National Park, Derbyshire, UK. April.

Clay Bolt / Rough Green Snake (Opheodrys aestivus) in undergrowth, Southern Appalachians, South Carolina, USA, North America, June.

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

Chris Mattison,Chris Mattison / Cedros gopher snake (Pituophis catenifer insulanus / Pituophis insulanus) Cedros Island, Baja California, Mexico

Rolf Nussbaumer / Western Coachwhip (Masticophis flagellum testaceus), young. Laredo, Webb County, South Texas, USA, April.

Daniel Heuclin / Close-up of Red Coachwhip Snake (Masticophis flagellum cingulum) scales. Controlled conditions. Near Tombstone, Arizona, USA, September.

Wild Wonders of Europe / Ziegler / Balkan whip snake (Coluber / Hierophis gemonensis) The Peloponnese, Greece, May 2009

Morley Read / Tropical flat snake (Siphlophis compressus) descending down a vine, with Rio Tiputini in the background, Orellana Province, Ecuador. (non-ex)

Morley Read / Slow motion clip of a Fer de Lance (Bothrops atrox) smelling with its tongue, Orellana Province, Ecuador. (non-ex)

Morley Read / Fer de Lance (Bothrops atrox) on the rainforest floor, Orellana Province, Ecuador. (non-ex)

Morley Read / Parrot snake (Leptophis ahaetulla), with a fly on its head, enters its mouth, Amazon rainforest, Orellana Province, Ecuador. (non-ex)

Morley Read / Parrot snake (Leptophis ahaetulla) threat display, Amazon rainforest, Orellana Province, Ecuador. (non-ex)