A message from our regular contributor David E.:

Here's a pretty cool site I found that has a lot of posters and ads for Byrds concerts. 

Click on each show, then scroll down to the bottom of each page.

https://www.concertarchives.org/bands/the-byrds?page=1#concert-table
 

We haven't checked yet, but the front page makes us think that this is a mix of performances, not only by The Byrds, but also by Gene Clark's various "Byrds Tribute" lineups and by Michael Clarke's Byrds and later The Byrds Celebration. I mean:

???