The dice snake (Natrix tessellata) or water snake[3] is a Eurasian nonvenomous snake in the family Colubridae, subfamily Natricinae. Its average length is 1.0–1.3 m (39–51 in). Body color may vary from greyish green to brownish or almost black, with dark spots on the back. The belly is sometimes vividly coloured in yellow or orange, with black spots, very similar to dice, hence the name.
^Mebert, K.; Amr, Z.S.S.; Al Johany, A.M.H.; Aloufi, A.A.H.; Jiang, J.; Meyer, A.; Sterijovski, B.; Baha El Din, S.; Pleguezuelos, J.; Sá-Sousa, P.; Corti, C.; Ajtic, R.; Tuniyev, S.; Orlov, N.L.; Ananjeva, N.B.; Cogălniceanu, D.; Andrén, C.; Crnobrnja-Isailović, J.; Aghasyan, A.; Avci, A.; Tuniyev, B.; Lymberakis, P.; Wilkinson, J.; Üzüm, N.; Podloucky, R.; Kaya, U.; Vogrin, M.; Pérez Mellado, V.; Cheylan, M.; Nettmann, H.K.; De Haan, C.C.; Schmidt, B.; Lau, M.; Borkin, L.; Milto, K.; Golynsky, E.; Belouskova, A.; Rustamov, A; Nuridjanov, D.; Munkhbayar, K. (2021). "Natrix tessellata". IUCN Red List of Threatened Species. 2021: e.T157256A745071. doi:10.2305/IUCN.UK.2021-2.RLTS.T157256A745071.en. Retrieved 21 February 2022.
^Boulenger, G.A. 1893. Catalogue of the Snakes in the British Museum (Natural History), Volume I. London. pp. 233-234