Wafer paper is the same as rice paper and it is edible. You are able to purchase it on Amazon if you are interested in making these feathers or any other design. You can also create flowers or butterflies out of the wafer paper to decorate cakes with.
Cup of Dee Cakes shows us how to create the feather using parchment paper, scissors or Exacto knife and a feather pattern. I would probably get scissors that I use for baking only. She uses Tylose glue / Sassie Sap Glue, which you can also buy on Amazon, to adhere to wire to place on the cake.
Your guests will be amazed with your creativity, well at least my guests would be knowing my non talent.
Click on the webpage in pink for tutorial.