Did any members of Buffalo Springfield ever record with the Byrds?

Yes, members of Buffalo Springfield did collaborate with The Byrds. Notably, David Crosby of The Byrds played with Buffalo Springfield during their early performances. Additionally, Neil Young, a member of Buffalo Springfield, and Roger McGuinn of The Byrds have shared stages and contributed to each other's music, especially during the 1960s and 1970s. Their musical paths often crossed due to their shared connections in the California rock scene.