Grass snakes move quickly and have a cautious personality, and generally do not develop feelings. Moreover, grass snakes also rely on pretending to be dead to protect themselves and deceive some predators. If caught by a predator, the grass snake will hiss as loudly as possible, release a foul-smelling and pungent substance from the anal glands, and will frequently slam the head against the predator with force, but will not bite .

The grass snake habitat is as high as 3060 meters above sea level. Live in various water bodies, such as ponds, lakes, streams, swamps, ditches, etc. Such sites usually have plenty of sunlight and provide a habitat for aquatic snakes. Grass snakes are also found in open forest areas, grasslands, wet moors, gardens, parks and hedgerows.

Grass snakes like to prey on frogs, toads and salamanders, as well as fish, small mammals and young birds. Grass snakes will swallow their prey directly after catching them. It is good at swimming and can dive and hunt for more than half an hour.