Nickname origins

Most of us know that there's no definitive origin of The Bluebirds as a nickname. One theory is that we were named after a play that was on at the New Theatre. Now's your chance to see it for yourself (but you'll have to travel to do so)

http://lightboxtheatre.co.uk/website/the-bluebird/

I always thought it was a play at the New Theatre that the players visited.
Weren’t we also known as the citizens as well?