Has anyone ever thought of putting up bird netting or a stronger permanent net up 8-10ft between trees to make a roof? I'm thinking it might help deter hawks, especially with the curtain, since it would mean a more closed in area for the hawk, harder to get in/out and not so easy to maneuver. Here is kinda what I'm talking about with a pic of my yard. Hopefully, you can understand what I'm talking about, too. White line is where the front 'curtain' would reach to, showing how big an area it is. If you would stand on the white line and look up, you would see the edge/curtain above you. The area would be 4x the size of my current run, 20 by 40ft. Pink line is the top of the netting, connecting to the trees. Blue line is the sag of the top netting, to look more 'real'. Red line is the bottom of the curtain, comes/hangs down from the red/edge. Gray vertical lines show the curtain hanging.