Young tender shoots and leaves are damaged or eaten, not only at ground level but often high up. Slime trails are sometimes seen near where slugs and snails have been active. Snails and slugs cause similar damage and both climb, often to a considerable height, above ground level.
Because of the protection provided by their shells, snails can move more freely over dry terrain than slugs. Unlike slugs, snails remain dormant over winter, often clustering together under empty upturned flower pots, stones or other protected places.