Grass Snakes like their name suggests like to live in open grassy areas, with bordered endings. Some like to be near ponds.
They like to bask in the sun and learn how to keep warm during winter months, such as burrowing into the ground where the temperatures are more stable. It will travel away from its location, presumably, after it has taught itself the basics of survival.
They like to eat frogs, toads, and possibly even fish and some insects.