I'm making a little beaver with wings, and I thought I'd show a bit of the process.
There's the beaver. Then a shot of the two wings. The top one is done-ish and the bottom one is half felted.
Once finished with both wings, I roughly attached them to the beaver's back. Notice that I left the tails of the wings with rough felt. That loose wool I can use as glue to felt into the beaver's body and wrap around the base of the wings and felt into both parts to attach everything together. I leave a good amount, I want the wings to be nice and stable.
Don't be afraid to add some extra felt to adhere the wings either, you want the fibers that are on the wings to go deeply into the beaver, the tangle between fibers needs to be nice and tight.
And once it's done, you get my last pictures, beaver with little wings!