Sirius Black: [in his letter] "Harry, I couldn't risk sending Hedwig. Since the World Cup the Ministry has been intercepting more and more owls, and she's too easily recognized. We need to talk, Harry, face to face. Meet me in the Gryffindor Common Room at one o'clock, this Saturday night. And make sure you're alone. Sirius. P.S...?
[the bird bites Harry's hand]
Harry: AH!
Sirius Black: "The bird bites."