organization called "Quiet Birdmen" ?

I found a brass card that says "The bearer is a member of ye Anciente and Secret Order Of QUIET BIRDMEN" FOUNDED January 1921 that was my Uncles. His membership number was 3606. I do know that he was a pilot as early as 1931 and I have a civil aeronautics administration airman certificate no. 9921 that was issued in 1939. He was also a Major in the AAF during WW2. Does this group still exist? Can anyone provide any more information about the "QB"

Thanks
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