One of the rarest and most unusual posters in the BG series, this was Wes Wilson's first poster for Bill Graham. Wilson's comic-book Batman and Robin contemplate the famous mynah bird, an on-stage feature of early Fillmore concerts. The show itself was a prime example of the eclectic nature of Fillmore events in the early days.
When the Avalon Ballroom and Bill Graham's Fillmore Auditorium began to hold weekly dance concerts, Wilson was called upon to design the posters. He created psychedelic posters from February 1966 to May 1967, when disputes over money severed his connection with Graham. Wilson pioneered the psychedelic rock poster. Intended for a particular audience, "one that was tuned in to the psychedelic experience," his art, and especially the exaggerated freehand lettering, emerged from Wilson's own involvement with that experience and the psychedelic art of light shows.