Okay... looking closer I all of a sudden realized that’s not a quarter haha! Still, Hummingbird feathers are very fragile and see-through, and almost veiny.
https://www.google.com/search?q=hummingbird+wing+feathers&client=safari&hl=en-us&prmd=sivn&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiclfb7sq7cAhWTLH0KHUQ9DFkQ_AUIEigC&biw=320&bih=454#imgrc=nE9j8k0MPYmOOM: