Here's what I did...........(copy from another post)
I have lost a pullet to a hawk. It couldn't carry her away. My chickens roam our orchard (think 2 rows of trees with bare area in between the rows) that is fenced 7 ft high.
Here's what we did: We staggered T posts in the bare area, they are about 3 ft apart. I tied a 2 ft long piece of scare tape to each T post. (so it moves in the wind) We also put up a windmill ($40 at Harbor Freight). We did all this to block the flight path. (we saw it come in) Our idea is that the hawk would be able to get in (as in come straight down), but it can't go OUT straight up. It needs a glide path, especially with a kill. So if it can't get OUT, maybe it won't come in.
It's been over a month now, and we have had some low fly overs, but so far so good. We were even out of town this weekend, and I worried about the girls the whole weekend. I was so relieved to get home and see they were all fine.
Obviously if you truly free range, this isn't an option. Unless you want to look like the white trash neighbor with "yard ornaments". (No offense intended to white trash)