Getting feathers put in your hair was a fad not too long ago. It was very popular and fun to put a little something in your hair. This fad was interesting but did not last because it was not very practical.
Lay out your gallery arrangement. Flip frames over. Mark hanger/nail spot on several pieces of wax paper taped together. Flip waxed paper over, tape to wall, nail into wall where indicated. Remove waxed paper. Hang photos.