I've seen all-black squirrels, albino skunks, skunks with inverted-colors, some deformed frogs and tortoises, and earthworms that had to be at least two feet in length.
Last year, my bf said he saw a "reverse" skunk--white with black stripes. I didn't know that was possible, and at the time I figured he'd seen a cat (though there isn't one around here which fits that description) or possibly the bottom of too many wineglasses. Now I'm wondering.