Pacific Banana Slug

(Ariolimax columbianus)

The Pacific banana slug can be found in foggy moist forest habitats of western Oregon.

The Pacific banana slug is the second-largest species of terrestrials in the world, growing up to 10 inches long and weighing up to 4 ounces. They are often bright yellow, although they may also be green, brown or white. Some slugs have black spots.

Diet and habitat
Banana slugs are considered general herbivores that eat all kinds of leaf litter, green plants and fungus. They are common in moist forest habitats.

Predators and threats
Their coloring allows them to camouflage with leaves on the forest floor. This serves as protection from such prey as beetles and raccoons.

They secrete a protective layer of mucus. The slime also contains pheromones to attract other slugs for mating. Females lay up to 75 translucent eggs in logs or on leaves. Slugs mate and lay eggs throughout the year. The adults provide no further care for their eggs, which will hatch in 3 to 8 weeks.


9755 SW Barnes Rd., Suite 210        
Portland, OR 97225        
Phone: 971-673-2944        
Fax: 971-673-2946

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