I always wondered how that pitch was scored.
Seriously, the umpired ruled it as "no pitch".
http://mlb.mlb.com/mlb/official_info/umpires/feature.jsp?feature=qa1
That site also says that the baseball rules do cover a bird being hit by a batted ball, in which case the ball is live (even if the bird isn't) and is played as if the ball had not hit the bird.
Fowl ball.