I was filming the moon at just around 04:18 in the morning at just under 3 quarter zoom .. this is what i caught when looking over footage .. if i blinked i would have missed it. First clip is normal speed the rest are slowed down upto 16x ... I do not think it is a bird .. too big and too fast, also look at the forward motion of the wings to a fully swept back position .. if you have ever seen the way they show dragons to fly this reminds me of that .. Ill let you decide !!
If you want to skip look at 0:05sec 0:29sec 0:50sec 1:10sec and 3:57sec .. dont forget to watch till end !!