I originally found the pattern for this Angry Bird on Ravelry, via The Itsy Bitsy Spider. I guess I was fortunate and printed it out in the nick of time, because she is no longer allowed to sell or distribute it. Here is another pattern, though. Really, it's the internet. You can find anything if you look long enough!
By the way, I think Ravelry is an AWESOME source for crochet ideas and patterns. Check it out!