I've got skins of squirrels, raccoons, a fox, a beautiful bobcat, a weasel, and a white spotted baby deer skin. I love the idea of taking something that's otherwise going to rot on the road, and turning it into a beautiful object.
Technique: I skin the animal, stretch the skin on a piece of plywood tack it down, cover it with salt, and then in a week, ship it UPS to a tanning guy in Pennsylvania. Six weeks later I get back (via UPS) a tanned skin. This one was surprisingly pretty, glossy and rich.
Also, I collect skulls and bones, mostly in the woods, sometimes on the beach, and clean and bleach them. Bones fascinate me. Nature is a marvelous designer and engineer.