Three Fanged Viper 
Vipers are known as the mostly evoluted snake in the world. Movable fangs, large fangs, fang enclosed in a sheath, venomous snakes with heat sensing pits, highly toxic venom are some of unique characteristics of viper family. In some case very rarely, we can find vipers with having more than two fangs. 


Most famous Sri Lankan snake rescuer Habarana Jeganadan has been found a Russel's Viper (Daboia russelii) with three fanged, from his living city Habarana.  The most important thing is, that all three fangs are functionable.

Russel's Viper (Daboia russelii)

Pictures : Habarana Jeganadan (copy righted)