What are the characteristics of courtyard snails?

Garden snails have become a very harmful pest. Every night or after heavy rain, they will come out for food and often bite off plants. When the weather is dry, they will shrink in the shell and seal the opening of the shell with dry and hardened mucus. Like many kinds of slugs and snails, garden snails have both male and female reproductive organs, so any two snails can mate and reproduce.