You can take the form of a swift bird of prey to soar above your foes.

Daily   ✦     Primal
Free Action      Personal

Prerequisite: You must have the wild shape power.

Effect: Until the end of the encounter, you can use wild shape to assume the form of a Tiny falcon. In this form, you gain a fly speed equal to your speed. You also gain a +5 bonus to Perception checks and a +4 bonus to AC against opportunity attacks. You can't attack, pick up anything, or manipulate objects.
    Until this power ends, you can use wild shape to change among this form, another beast form, and your humanoid form.

Published in Player's Handbook 2, page(s) 99.