Juan Carlos Munoz / Namib sand snake (Psammophis namibensis) in sand dunes, Swakopmund, Erongo Region, Namibia.

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

Wild Wonders of Europe / Ziegler / Dead snake on a road, probably a Balkan whip snake (Hierophis gemonensis) or a Western whip snake (Hierophis viridiflavus) with a car driving past, Patras area, The Peloponnese, Greece, May 2009

Chien Lee / Oriental Whip Snake (Ahaetulla prasina) juvenile, Danum Valley Field Center, Sabah, Borneo, Malaysia

Michael & Patricia Fogden / Oriental Whip Snake (Ahaetulla prasina) camouflaged among vines in the rainforest, southeast Asia

Daniel Heuclin / Sonoran coachwhip snake (Masticophis flagellum cingulum). Catalina State Park, Arizona, USA.

Daniel Heuclin / Sonoran coachwhip snake (Masticophis flagellum cingulum). Catalina State Park, Arizona, USA.

Robert Valentic / Asian Vine Snake (Ahaetulla prasina) head portrait in lowland rainforest, Tioman Island, Malaysia. Dry season.

Robert Valentic / Asian vine snake (Ahaetulla prasina) male, in a terraced rice paddy field near Ubud, Bali, Indonesia. Wet Season.

Dong Lei / Asian vine snake (Ahaetulla prasina) in tree. Gaoligong Mountain National Nature Reserve, Yunnan Province, China.

Dong Lei / Asian vine snake (Ahaetulla prasina) in tree. Gaoligong Mountain National Nature Reserve, Yunnan Province, China.

Fabio Pupin / Western whip snake, (Hierophis viridiflavus), non-invasive ID marking by cutting ventral scales, Italy, April . Non-ex.

Fabio Pupin / Western whip snake, (Hierophis viridflavus), basking on granite rocks, Montecristo Island, Tuscany, Italy, June . Non-ex.

Fabio Pupin / Western whip snake, (Hierophis viridiflavus), dark morph, basking in grass, Italy, April . Non-ex.

Fabio Pupin / Western whip snake, (Hierophis viridiflavus), basking in garden, Italy, April . Non-ex.

Duncan Murrell / Green vine snake (Ahaetulla nasuta), Sinharaja Forest Reserve, Unesco Biosphere Reserve and World Heritage Site, Sri Lanka. The green vine snake changes from pure green to chequered markings when it f...

Robert Valentic / Caspian whipsnake (Dolichophis caspius) male basking on rocky ground. Near Loutros, Evros, East Macedonia and Thrace, Greece.

George Sanker / Everglades racer (Coluber constrictor paludicola). Everglades National Park, Florida, USA. March.

George Sanker / Everglades racer (Coluber constrictor paludicola) with tongue out. Everglades National Park, Florida, USA. March.

George Sanker / Everglades racer snake (Coluber constrictor paludicola). Everglades National Park, Florida, USA. March.

Robert Valentic / Lesser black whipsnake (Demansia vestigiata) at sunset, Normanton, Gulf of Carpenteria, north-western Queensland, Australia. Wet season.

David Pattyn / Caspian Whip Snake (Dolichopis caspius), Kresna Gorge, South West Bulgaria, April

Robert Valentic / Speckle-headed whipsnake (Ahaetulla fasciolata) sub adult from riparian lowland rainforest on Phuket Island, Thailand.

Jen Guyton / Dwarf sand snake (Psammophis angolensis) curls up in Gorongosa National Park, Mozambique.

Claudio Contreras / Clarion Island Whip Snake (Masticophis anthonyi), IUCN Critically Endangered, Clarion Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage...

Claudio Contreras / Clarion Island Whip Snake (Masticophis anthonyi), IUCN Critically Endangered, Clarion Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage...

Claudio Contreras / Clarion Island Whip Snake (Masticophis anthonyi), IUCN Critically Endangered, Clarion Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage...

Yashpal Rathore / Green vine snake (Aheatulla nasuta), Agumbe, Karnataka, Western Ghats, India.

Yashpal Rathore / Green vine snake (Aheatulla nasuta), Agumbe, Karnataka, India.

Yashpal Rathore / Green vine snake (Aheatulla nasuta), Agumbe, Karnataka

Barry Mansell / Eastern coachwhip snake (Masticophis flagellum flagellum) North Florida, USA, April.

Barry Mansell / Eastern coachwhip snake (Masticophis flagellum flagellum) North Florida, USA, April.

Barry Mansell / Eastern coachwhip snake (Masticophis flagellum flagellum) North Florida,USA, April.

Jiri Lochman / Narrow-headed whipsnake (Demansia angusticeps) with tail in water, Edgar Range, Kimberley, Western Australia, June. Venomous species.

Jiri Lochman / Narrow-headed whipsnake (Demansia angusticeps) Kimberley, Western Australia, June. Venomous species.

Jiri Lochman / Narrow-headed whipsnake (Demansia angusticeps) entering water, Edgar Range, Kimberley, Western Australia, June. Venomous species.

Jiri Lochman / Narrow-headed whipsnake (Demansia angusticeps) two juveniles, Edgar Range, Kimberley, Western Australia. Venomous species.

Juan Carlos Munoz / Namib sand snake (Psammophis namibensis) in sand dunes, Swakopmund, Erongo Region, Namibia.

Juan Carlos Munoz / Namib sand snake (Psammophis namibensis) in sand dunes, Swakopmund, Erongo Region, Namibia.

Juan Carlos Munoz / Namib sand snake (Psammophis namibensis) in sand dunes, Swakopmund, Erongo Region, Namibia.

MYN / JP Lawrence / Blackmask racer (Coluber constrictor latrunculus) coiled. Oxford, Mississippi, USA, April. Meetyourneighbours.net project

MYN / JP Lawrence / Olive Whipsnake (Chironius fuscus) coiled, Mahury, French Guiana Meetyourneighbours.net project

Matthew Maran / Oriental whip snake (Ahaetulla prasina) Khao Yai National Park, Thailand.

Ole Jorgen Liodden / Tanganyika sand snake (Psammophis tanganicus) on branch, Samburu, Kenya.

MYN / Gil Wizen / Caspian whipsnake (Coluber jugularis) juvenile, Central Coastal Plain, Israel, March. meetyourneighbours.net project

Paul Williams / Man holding juvenile vine snake (Ahaetulla nasuta), Agumbe, Thirthahalli taluk, Malnad, Karnataka, India, July.

Pete Oxford / Coachwhip (Masticophis flagellum) head detail. Little St Simon's Island, Barrier Islands, Georgia, USA, March.

Pete Oxford / Coachwhip (Masticophis flagellum) tail. Little St Simon's Island, Barrier Islands, Georgia, USA, March.