I have a farm pond about 60' across (fairly round) and 5 1/2' deep. I've had trouble with one particular heron for years. I've tried fishing line at intervals and then finally put a 4' fence around it with bird spikes on the top of the stakes. He would stand on the spikes and jump in. Now he just flies in and lands at the edge. (I always thought heron wouldn't land in water but they do). I have 2 fake alligators and he doesn't care. I just put 2 blue jean/flannel shirt/hats scarecrows in chairs but he doesn't care about them either. I've tried motion detectors, radio, floating shiny silver platforms. Again - NO. I put my fake heron up after mating season and he thinks it's his friend. I finally tried something that might be working. I got clothesline and cut to length to go from one stake to another at angles about a foot out from the edge. Put a zip tie, threaded a blank CD (they're so shiny), then another zip tie to hold it in place. Did this about every foot/foot and a half. So far it seems to be working (3 days out). If he tried to fly in I think his wings will hit the line and he can't move around the edge because the lines intersect. I just wanted to share this for anybody battling the same problem. Feel free to respond with any questions or other suggestions. I'm new to this forum so sorry this is so long a thread. I live in Capon Bridge, WV. I'll try to upload a few pictures. No - it's not pretty but if it saves my fish I don't care.