The Byrds (formed in Los Angeles, California, in 1964) were an American rock band. The Byrds were popular and influential through the latter part of the 1960s and early 1970s. Critic Richie Unterberger declares The Byrds' most enduring contribution was "melding the innovations and energy of the British Invasion with the best lyrical and musical elements of contemporary folk music," but they also helped forge such subgenres as folk rock, space rock, raga rock, psychedelic rock, jangle pop, and –- on their 1968 album Sweetheart of the Rodeo –- country rock. After several line-up changes (with lead singer/guitarist Roger McGuinn as the only consistent member), they broke up in 1973.   Wikipedia