I recently lived in south Florida for a year as a kayak guide. While down there I noticed some owners of beachside restaurants string somewhat heavy monofilament fishing line in the air about 4 feet apart to keep the gulls from swooping down and bothering the patrons. I've been thinking about utilizing this tactic in my barnyard since hawks are a huge problem and I'd probably get locked up longer for shooting a hawk than a person. I don't want to use my pheasant pens for chickens and If it works it will be a much easier and cost effective way to deal with the "Terror from Above." I hope this info will help others who are having the same problem. If anyone else tries it let me know how it works out for you.