I have about 50 birds; chickens, ducks, turkeys etc. They free range on approx. 2 acres. We have issues with hawks and one very big bald eagle. I have lost a few chickens and one call duck. I haven't had a hawk take a bird; always just ripped them apart & left for me to find. I cant cover that much area so here is what I have done to help keep them away. I have hung about 30 old CD's on fish line from trees. All at different heights. Hawks don't like the reflections & the other birds, especially the turkeys, loves to play with them. I also found 1" red plastic ribbon/tape and basically decorated all my trees. Throwing the spool up over branches leaving 10-20' tails to blow in the wind. Hawks dislike the color & the movement. My husband says our backyard looks ridiculous but my birds are alive.