Hi Ketut, this is an excellent design.
Would you try another version where the birds head and beak have more of a bald eagle feel to it? Take a look at this image
http://www.hoax-slayer.com/images/bald-eagle.jpg , the eagles beak is thicker and has a prominent hook to it. I know this will be tiny in the final product, but I think it will still add to your already fine design.
Thank you