"Lady Bird" is a jazz composition written by Tadd Dameron, first recorded in 1948 for Blue Note Records by Dameron's sextet featuring Fats Navarro on trumpet. Composed around 1939, the piece is one of Dameron's most enduring contributions to the jazz repertoire. The melody is lyrical and smooth, moving over a harmonic framework built primarily on ii-V progressions that cycle through keys related by major thirds, including movements to Eb, Ab, and G from its home key of C major. The composition's closing passage features what has become known as the "Tadd Dameron turnaround," a sequence of major seventh chords whose roots descend by major thirds (Eb, Ab, Db) before resolving, substituting conventional dominant motion with a more colorful harmonic pathway. This device was groundbreaking for its era and influenced subsequent jazz composition. The concise structure makes it well suited for extended improvisation, and performances typically feature double head-ins and head-outs. Miles Davis composed "Half Nelson" as a contrafact based on the Lady Bird changes. The tune has been recorded over ninety times by artists spanning several decades, including Art Blakey and the Jazz Messengers, Dexter Gordon, Chet Baker, Stan Getz, Bud Powell, and Barry Harris. Lyrics were later added by Stanley Cornfield, though the piece is primarily performed as an instrumental.