Check out this awesome creation from Ptolemy Elrington:
He has a whole bunch of other creatures for sale as well.
Hubcap creatures are made entirely from re-cycled materials. All the hubcaps are found, usually on the side of the road, and therefore bear the scars of their previous lives in the form of scratches and abrasions. I believe these marks add texture and history to the creatures they decorate, and so choose not to fill, overpaint or alter them in any way.
Via (Make Magazine)