Slug & Snail

Family Name

Phylum Mollusca, Class Gastropoda





Most are small, measuring up to 1 inch. Some snails may have shells up to 1.5 inch or more.

Some slugs measure up to 3 inches while others (e.g., banana slugs) can measure up to 10 inches when fully extended.


Varies depending on species. Usually brown, yellow or green. Some species may be black.


Slugs and snails are well-known. Snails enclose themselves with a protective shell, while slugs have no such protection. Slugs cover themselves with a slime layer that leaves a trail wherever they crawl.

Both, slugs and snails can be serious pests of landscape plantings and slugs can be found crawling on floors indoors at times. Snails and slugs are mainly nocturnal, preferring to feed in the evening or on dark days. Slugs are often found feeding on pet food left outdoors, often making it unpalatable due to the slime left behind. Both molluscs need moist conditions to survive. Some snails, however, are capable of sealing themselves within their shells and surviving up to four years waiting for conditions to improve. Natural enemies of slugs and snails include rats, mice, toads, some predacious beetles and their larvae and wild birds.


Slugs and snails are common inhabitants around most homes, not located in dry climates. They are found outside amongst vegetation and items in contact with the soil. On occasion, large numbers can develop around a home or other buildings, resulting in numerous specimens, being seen on patios, decks and even indoors.

They feed on and damage many types of plants and are seen as pests by many gardeners. Slugs, especially, can survive and thrive in damp basements and crawl spaces.

Tips for Control

A common home remedy for slugs is the placement of shallow pans of beer. Although such “traps” will attract and capture slugs by themselves, they do little to remedy a significant slug problem.

Treatment solutions include:

 Thick ground covers, such as ivy, “monkey” grass, etc. should not be located next to or near a foundation as it provides harbourage for innumerable snails, slugs, insects, spiders, mice and other pests.
 Items in contact with the soil should be removed, wherever possible.
 Exterior cracks and holes should be sealed, especially along the foundation. Weep holes can be “closed” by stuffing pieces of wire mesh or screening into the openings.
 Most nurseries and gardening stores sell slug and snail baits that can be applied to areas outdoors where these animals are posing a problem. When using such baits, label directions should be carefully followed.