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

Michael D. Kern / Black headed cat eye snake (Boiga nigriceps) captive, from SE Asia

Danny Green / Grass Snake (Natrix natrix) on lily pad, reflected in water. Leicestershire, UK, October.

Claudio Contreras / Mexican / Brown Vine Snake (Oxybelis aeneus) with mouth open. Maria Madre Island, Islas Marias Biosphere Reserve, Sea of Cortez (Gulf of California), Mexico, June.

Daniel Heuclin / Great basin Gopher Snake / Bullsnake (Pituophis catenifer deserticola) head profile, controlled conditions, Joshua Tree National Monument, California USA

Tony Phelps / Boomslang (Dispholidus typus) Immature male hunting in thorn bush above deHoop Vlei, Western Cape, South Africa, December

Pete Oxford / Eastern indigo snake (Drymarchon couperi) The Orianne Indigo Snake Preserve, Telfair County, Georgia, USA, threatened species, captive

Sven Zacek / Grass Snake (Natrix natrix) looking out from between wood slats. Estonia, Europe, June.

Robin Chittenden / Grass snake (Natrix natrix) swimming at surface, Dobrogea Tulcea, Danube Delta, Romania, May

Terry Whittaker / 2020VISION / Grass snake (Natrix natrix) swimming through water, Wicken Fen, Cambridgeshire, UK, June

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

Pete Oxford / Sipo Snake (Chironius exoletus) head against a white background. Captive. Endemic to Mindo Cloud Forest, Ecuador.