Slugs are know as "naked snails", without the typical spiral shell evident in snails. Slugs size ranges from 10-40 mm in length, depending on the species. Slugs and snails produce slime across their bodies and move in a sliding motion. They are most active at night or during cloudy or rainy periods. Eggs are laid in the ground and also act as the overwintering stage.
Snails and slugs feed on living plants and organic matter. They have rough tongues with which they rasp foliage and can cause extensive damage to seedlings and other soft garden plants. A silvery trail is sometimes the only evidence of the nightly visitor that destroyed plants.