A blueberry slug is a species of slug native to most of California, Nevada, Oregon, and Arizona. It is a herbivore that mainly feeds on decaying vegetation, fruits, vegetables, grass, leaves, shrubs, bushes, mosses, and lichens. Unlike most slug species, they have thicker heat-proof skin, which helps keep the slugs alive, even in the hottest days as well as the driest in their native range, so it is common to see blueberry slugs in a field and other places even if the day is hot. It is basically a slug that resembles a banana slug, in which it is very closely related to, but is blue rather than yellow (which is how the blueberry slug got its name). Since it's bright blue, it has to be poisonous to almost all predators that try to eat it. Because of its toxicity, most predators will leave t