what a fabulous idea!! I will have to make one soon!
I went to the dollar store today and got 2 red acrylic wine goblets. Used a jig saw to cut the stems off, then used a dremel circular blade to cut closer to the bottom of the goblet where you can see the end of the bottom and day light. I'm going to either screw in and use a heavy fishing line or rig up a system with fishing line swivels. Maybe also go with popsicle sticks into a cross formation sticking a little past the bottom of the bell shape with some type of fabric to help it spin in the wind. If all goes well, it'll look nice in the trees and scare off poopy birds and hawks. I'll post pics as I get closer to completion. I'm sitting on the fence on whether I should fork over $10 for some tiny mirror tiles or cut my own
I will be interested to see your pictures when you are done. What I ultimately did was purchase small hand mirrors, tied them to hooks designed to hang small bird feeders from tree branches, and hung them up at various locations around the yard. The wind moves them around and they reflect light around the yard. Cannot attest to the effectiveness as we have never lost a duck to hawks, and with the season change I have not spotted any hawks in the last couple of weeks.
I lost two Bantam hens within a week to a big Red Tail Hawk. But I got the hens after he dropped them. He came back several times for the 2nd one but couldn't find her. I put two of the decorative colored plastic 'fans' ie. pin wheels? in my hen yard, and when Hawk came back he steered clear, and flew up into the fir trees, when last I saw him. He hasn't been back, but I need MORE pinwheels. It's hard to find them in the middle of Winter. I'm going to try the red cone, and little mirrors. Thank you for this idea.