Recently I watched an echidna wandering around, digging for ants under my studio. I have to add these quills are not from it! These images were taken of the quills of a dead echidna which had been killed on the road. Since I can't use them in my jewellery as they are a protected species I thought I'd use the images my aluminium, photographic jewellery.
See the earrings in janine combes jewellery store http://janinecombes.com/collections/motif-collection/products/echidna-quills-earrings