Harry's Embarrassing Animagus Form
Harry secretly goes through the process of becoming an Animagus during the summer between third and fourth year. On the bright side, his animal form is capable of flight and fixed his sight. That makes sense, it is a species of falcon after all.
But unfortunately with good comes the usual Potter luck. In addition to being able to speak to snakes, Harry now can speak to all species of birds, and dragons apparently he later learns. Not that big of a deal except birds never, ever, shut up. It's only after he finds out whar the first task of the tournament that he reveals his form to his friends. Harry is, much to his embarrassment, a merlin.