Cut a small piece of ribbon about the length of the wing. Seal the edges by running it along a flame
Sew the piece of ribbon under the wing at the ends.
Make a long tube out of the same fabric as your pants fabric. Turn right side out and press tucking in the ends. You’ll want your strip to extend 3-4 inches out of your pocket. The width of your tube should be about 1/4 inch.
Next position the pockets where they will go on your pants. Lay the tube down so that most of it will be in the pocket and 3-4 inches extend out of it.
Sew the bottom edge of the tube down.
Thread the bird onto the tube and sew the top edge down (unless this needs to be sewn on a part of the pant that is not finished yet).
Continue putting together your pants according to your pattern.