Animal skulls have such elegant and interesting shapes that they make the perfect inspiration for copper jewelry. Don't see the animal you're looking for? Just ask; if I can find a good reference image, I can make it for you.
My other shops: White Raven Arts (http://www.etsy.com/shop/WhiteRavenArts) has all my art and hand-pulled prints, and White Raven Ink (http://www.etsy.com/shop/anagramforink) has my letterpress printed greeting cards and hand-bound books.