Flapter from Laputa: Castle in the Sky - https://ghibli.fandom.com/wiki/Flaptter

Love that movie and I would love to animate the wings to do justice to it. On the backlog.

Model from https://3dwarehouse.sketchup.com/model/2fc818a1ad5c460fe738f481f8560d58/Flapter

Video from flight in Odaiba after the Japan World Update: