Per Wikipedia:
David Van Cortlandt Crosby was an American singer, guitarist, and songwriter. In addition to his solo career, he was a founding member of both the Byrds and Crosby, Stills & Nash.
Crosby joined the Byrds in 1964. They had their first number-one hit in April 1965 with a cover of “Mr. Tambourine Man” by Bob Dylan. Crosby appeared on the Byrds’ first five albums and produced the original lineup’s 1973 reunion album. He subsequently formed Crosby, Stills & Nash in 1968 with Stephen Stills and Graham Nash.
