Laurie Campbell / Slow worm (Anguis fragilis) female with newborn young on rock face, controlled conditions, Berwickshire, Scotland, July

Alex Hyde / Slow worm (Anguis fragilis) photographed on a white background, Midi-Pyrenees, France, August.

Simon Colmer / Slow-worm (Anguis fragilis) on white background Sussex, UK

Colin Varndell / Slow worm (Anguis fragilis) Powerstock Common, Dorset, April

Wild Wonders of Europe / Lesniewski / European glass lizard (Ophisaurus apodus) Bagerova Steppe, Kerch Peninsula, Crimea, Ukraine, July 2009

Wild Wonders of Europe / Lesniew / European glass lizard (Ophisaurus apodus) portrait, Bagerova Steppe, Kerch Peninsula, Crimea, Ukraine, July 2009. WWE BOOK

Wild Wonders of Europe / Ziegler / European glass lizard (Pseudopus apodus) portrait, Western Peloponnesee, The Peloponnese, Greece, May 2009

Wild Wonders of Europe / Ziegler / European glass lizard (Pseudopus apodus) portrait, Western Peloponnesee, The Peloponnese, Greece, May 2009

Wild Wonders of Europe / Ziegler / European glass lizard (Pseudopus apodus) Western Peloponnesee, The Peloponnese, Greece, May 2009

Fabio Pupin / Slow worm (Anguis fragilis), Romania.

Robert Valentic / European legless lizard (Pseudopus apodus thracius) male in a forest clearing in the Dadia Forest, Thrace district , Greece, August. Controlled conditions.

Fabio Pupin / European glass lizard, (Pseudopus apodus), Croatia, April . Non-ex.

Fabio Pupin / Italian slow worm, (Anguis veronensis), Italy, June . Non-ex.

Fabio Pupin / European glass lizard, (Pseudopus apodus), Croatia, April . Non-ex.

Fabio Pupin / Slow worm, (Anguis colchica) Romania, July . Non-ex.

Robert Valentic / European legless lizard (Pseudopus apodus) on rock amongst Poppy (Papaver rhoeas) flowers. Near Evros River, Loutros, Evros, East Macedonia and Thrace, Greece.

Kerstin Hinze / Slow worm (Anguis fragilis) sensing, flicking its tongue, Bavarian Forest National Park, Germany. August.

Philippe Clement / Close-up of a male Slow worm (Anguis fragilis), smelling with tongue, Luxembourg, April.

Dave Bevan / Pair of Slow worms (Anguis fragilis) exposed when roofing felt is lifted, Carmarthenshire, Wales, UK, May.

Nick Upton / Slow worm (Anguis fragilis) on coastal clifftop grassland. Cornwall, England, UK. May.

Brian Bevan / Scheltopusiks (Pseudopus apodus) feeding on locust, UK. Captive, native to Europe and Central Asia.

Nick Upton / Slow worm (Anguis fragilis) on coastal grassland, Cornwall, UK, May.

Nick Upton / Slow worm (Anguis fragilis) sunning on a lichen covered boulder on coastal clifftop grassland, Cornwall, UK, May.

Nick Upton / Slow worm (Anguis fragilis) on coastal grassland, Cornwall, UK, May.

Nick Upton / Slow worm (Anguis fragilis) moving through coastal grassland, flicking its tongue to pick up scents, Cornwall, UK, May.

Nick Upton / Slow worm (Anguis fragilis) sunning on a lichen covered boulder on coastal clifftop grassland, Cornwall, UK, May.

Franco Banfi / Dotted galliwasp lizard (Diploglossus millepunctatus) Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Franco Banfi / Dotted galliwasp lizard (Diploglossus millepunctatus) Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Robin Chittenden / Slow worm (Anguis fragilis) crawling along grass, Norfolk UK April

Robin Chittenden / Slow worm (Anguis fragilis) head profile, Norfolk UK April

Robin Chittenden / Slow worm (Anguis fragilis) head profile, Norfolk UK April

Dave Bevan / Slow worm (Anguis fragilis) basking before moving into cover, Carmarthenshire, Wales, UK. September.

Barry Mansell / Slender glass lizard (Ophisaurus attenuatus) North Florida, USA, May.

Barry Mansell / Mimic glass lizard (Ophisaurus mimicus) Florida, USA, May.

Claudio Contreras / Imbricate alligator lizard (Barisia imbricata), Milpa Alta Forest, Mexico, July

Claudio Contreras / Imbricate alligator lizard (Barisia imbricata), Milpa Alta Forest, Mexico, July

Claudio Contreras / Imbricate alligator lizard (Barisia imbricata), Milpa Alta Forest, Mexico, July

Claudio Contreras / Imbricate alligator lizard (Barisia imbricata), Milpa Alta Forest, Mexico, July

Claudio Contreras / Imbricate alligator lizard (Barisia imbricata), Milpa Alta Forest, Mexico, July

Staffan Widstrand / Slow-worm (Anguis fragilis) Musteika Village, Lithuania, May.

MYN / Paul van Hoof / Slow worm (Anguis fragilis) male portrait, The Netherlands, April. Meetyourneighbours.net project

MYN / Paul van Hoof / Slow worm (Anguis fragilis) male, The Netherlands, April. Meetyourneighbours.net project

Martin Gabriel / Sheltopusik (Pseudopus apodus) portrait, Armenia, May. Captive

Nick Upton / Slow worm (Anguis fragilis) basking on a garden wall, Wiltshire, UK, July.

Nick Upton / Slow worm (Anguis fragilis) on the move over a garden wall, Wiltshire, UK, July.

Chris Mattison / Northern Alligator Lizard (Gerrhonotus coeruleus) Golden Bluffs, California, USA, April.

MYN / Clay Bolt / Eastern Glass Lizard (Ophisaurus ventralis) South Carolina, United States, May. Meetyourneighbours.net project

MYN / Clay Bolt / Eastern Glass Lizard (Ophisaurus ventralis), South Carolina, United States, May. Meetyourneighbours.net project