Natrix maura
（重定向自Viperine Snake）
Natrix maura is a natricine water snake of the genus Natrix. Its common name is viperine water snake or viperine snake. Despite its common names, it is not a member of the subfamily Viperinae. This nonvenomous, semiaquatic, fish-eating snake was given its common names due to behavioural and aesthetic similarities with sympatric adder species.