"Flightless Bird, American Mouth" is a folk-rock waltz written and performed by Iron & Wine, famously featured as the "prom song" in the first Twilight film. It explores themes of lost innocence and adulthood, with a "Wedding Version" also featured in Breaking Dawn - Part 1 . You can find the full lyrics at: Genius Wikipedia
The Twilight Saga: Breaking Dawn – Part 1 Soundtrack - Sleeping At Last "Flightless Bird, American Mouth" is a folk-rock waltz