The Byrds were a groundbreaking American rock band formed in Los Angeles in 1964, recognized for shaping the sound of folk rock, psychedelic rock, and country rock. Led by Roger McGuinn, the group's signature harmonies and jangly 12-string guitar style became a defining influence on rock music. Their early hits, including Mr. Tambourine Man and Turn Turn Turn, blended folk traditions with the energy of the British Invasion. Hits like Eight Miles High pushed the boundaries of psychedelic rock, while the album Sweetheart of the Rodeo helped pioneer country rock. The band's lineup shifted frequently, with McGuinn as the only constant member. After their initial period of widespread popularity in the mid-1960s, various members launched influential projects of their own, such as Crosby Stills Nash and Young and the Flying Burrito Brothers. The Byrds were inducted into the Rock and Roll Hall of Fame in 1991 and remain celebrated for their role in expanding the possibilities of rock music.