Hood Thumpers are those curiously tame rabbits that come looking for a snack under the bird feeder in your urban back yard. It's not clear where they come from or where they live, but they have a greater cuteness factor than that of the urban squirrel.
Bob: "Hey Tom, your cats are freaking out on the back porch, what's up with that?"
Tom: "Oh, they're really into those Hood Thumpers that are grazing beneath the bird feeders. Be careful when you step out or you'll trip over one!"