Giant Leopard Slug (Limax maximus) - 2016-5-30 Newark DE
This one wasn't too big, maybe 3-4".
These are omnivores, will eat plants and even resort to cannibalism.
At night, in the dark: Chased a skunk, got a frankenrabbit photo, and saw this eating a "reconstituted" worm. It had rained and many worms died on sidewalk and became crunchy critters after a couple of days of sun. Then it rained again. I seems Leo was in the mood for worm jerky.