Get a styptic pencil for shaving cuts or a container of the powder you put on a dog/cat toenail when accidentally cut. "Quik Stop". Any good pet store will have this. Get the powder, wet your finger and dab the powder on it. Press it gently to where the wing is bleeding to stop it. You can also try cornstarch but you will have to press and hold it to the wound with some pressure to get it to work.