FREE Coyote Howl tribal design

I have been trying to make these tribal designs for some time in paper and pencil, and now I decided to do one on the computer. And here it is! A coyote!(or at least that's what it looks like...)
I welcome any suggestions, BUT don't criticise because I am COMPLETELY NEW to this.

Oops! Almost forgot! This design can be FREELY used as long as you credit me or you link back to my deviantART profile (louawolf.deviantart.com)BUT you are NOT allowed to use this for commercial uses