Some are poisonous and some are not.

The common grass snake lives in plains, hills or mountainous cultivated areas and likes to prey on frogs and fish, it is a common non-venomous snake.

To identify a venomous snake, a poisonous snake has a triangular head, colorful patterns on its body, and a short, thin tail; a non-venomous snake has an oval head, monotonous colors on its body, and a thin, long tail. If bitten, the wound is two holes, and non-venomous snakes are larger, the bite wound is up and down two semi-circular type.