Tower: Katana ###F you are number two for landing following a Piper Warrior.

Katana ###F (a student ... me): Number two following a Warrior that I am looking for.

Tower: The Warrior is on left downwind at about 2 oíclock.

Katana ###F: I have the traffic in sight, Katana ###F.

(Few moments pass)

Katana ###F: Tower, Katana ###F does not have the traffic in sight. What I saw was a bird.

Tower: (Laughter from the tower) Katana ###F, continue downwind. I'll call your turn to base.