The Byrds /bɜːrdz/ were an American rock band formed in Los Angeles, California in 1964.  The band underwent multiple lineup changes throughout its existence, with frontman Roger McGuinn (known as Jim McGuinn until mid-1967) remaining the sole consistent member.  Although they only managed to attain the huge commercial success of contemporaries like the Beatles, the Beach Boys, and the Rolling Stones for a short period in the mid-1960s, the Byrds are today considered by critics to be nearly as influential as those bands. Their signature blend of clear harmony singing and McGuinn's jangly twelve-string Rickenbacker guitar was "absorbed into the vocabulary of rock" and has continued to be influential.