Danny Green / 2020VISION / Adder (Vipera berus) head portrait, Staffordshire, England, UK, April

Daniel Heuclin / Brown-banded Southern Water Snake (Nerodia fasciata) head in profile as it tastes the air with tongue. Controlled conditions. Lake Fausse-Pointe State Park, Louisiana, USA, November.

Solvin Zankl / Grass snake (Natrix natrix) head portrait flicking tongue

Bence Mate / Head portrait of Satiny Parrot snake (Leptophis depressirostris) swallowing frog, Hungary, Europe

Graham Eaton / Snake Pipefish (Entelurus aequoreus) head portrait in profile in weed, Cardigan Bay, Wales, May.

Rolf Nussbaumer / Western Cottonmouth snake (Agkistrodon piscivorus leucostoma) on lake flicking tongue. Fennessey Ranch, Refugio, Coastal Bend, Texas Coast, USA

Rolf Nussbaumer / Rough Green Snake (Opheodrys aestivus) head portrait, Refugio, Coastel Bend, Texas, USA

Rolf Nussbaumer / Head portrait of Gulf Coast Ribbon snake (Thamnophis proximus orarius) covered in duckweed and swimming, with tongue protruding, Fennessey Ranch, Refugio, Corpus Christi, Coastal Bend, Texas Coast, U...

Rolf Nussbaumer / Checkered Garter Snake (Thamnophis marcianus marcianus) coiled with tongue protruding. Fennessey Ranch, Refugio, Corpus Christi, Coastal Bend, Texas Coast, USA

Paul Hobson / Grass snake (Natrix natrix) swimming amongst duck weed, Oxfordshire, UK

Edwin Giesbers / Shed skin of grass snake {Natrix natrix} on lilypad, Netherlands.

Edwin Giesbers / Grass snake {Natrix natrix} coiled, the Netherlands