Youngsters take a high proportion of lizards and grasshoppers. A largely biurnal species usually occuring near water. Has been rediscovered recently in some wetlands of the country. Its food consists predominantly of frogs anf fish. A rather large snake, usually up to 120 cm, often less but occasionally up to 200 cm.
Females grow larger than males.
It has a very variable colur. Natrix natrix is a largely diurnal spe- cies and usually occurs near water. Swims well and may hunt in water. When disturbed may hiss and strike with mouth closed, but rarely bites. Often voids evil smelling contents of anal gland when handled, and may feign death, Iying on back with mouth open and tongue hanging out.