We have Red Tail Hawks out here on the coast of CA. They love chicken. Our girls are free range during the day and cooped at night. We have lots and lots of trees but we are on 4 acres surrounded by 20 acres of open pasture land so the Hawks hunt the area for squirrels and Dove. Sadly even with plenty of cover, the Hawks have killed a couple of our chickens. Hawks here, like most states, are protected either directly or by being a non-game bird so shooting them isn't something I want or can do. I've noticed that many other types of birds (everything from 'tweety' birds, crows, jays etc) attack or harass the Hawks when they try do a fly by into the smaller birds territory. I'm thinking of encouraging these smaller bird varieties to stick around to help protect the chickens by putting up a few small bird houses and feeders in strategic locations. It seems like a logical move.