Paper Cosplay Wing Tutorial by ~le-shae on deviantART. Sorry I'm pinning so many wing tutorials, but a friend of mine is planning to dress as Castiel and I might take some tips---and I might be an angel.
This woman's tutorial/walk-through on how she made her costume wings is *amazing*. Awesome creativity, and some pretty amazing engineering! Perfect for cosplay (I absolutely have to make a set of these wings)
Coolest Minecraft Ender Dragon Costume with Articulated Wings