I am trying something, maybe a waste of time, but I found a Halloween toy bat, battery operated. It is black, flaps its wings and hangs from a string. I will be hot gluing chicken feathers to it, than hang it just high enough to have the flapping wings hit the ground and leaves. I have worked up distress sounds for the MP3 player and mini speaker. Who knows? Igor! More feathers!! I just like tinkering with silly ideas.