While out hiking the trail behind the office where I work I discovered several slugs munching on the mushrooms that had popped up on the mulched trail. Recent rains had created ideal mushroom growing conditions in the timber. This large gray slug is one of the most common slugs found in Missouri and they can reach lengths up 4 inches. Slugs feed on a wide variety of items, but seem to prefer fungus.
If you would like to learn more about slugs visit a past post of mine from Tennessee