Suzie, we have the same problem with hawks, right here in a neighborhood. My friend just lost her Wyondotte to a hawk. It was so aggressive after having to leave it there after killing it. It must have been interrupted. It kept flying over them when they went out. They had the chicken in a box, and it still kept flying over them, and landing on their coop. When they went to bury the chicken, that thing swept just feet above their daughter. That was it. They called authorities, and the guy said it was a coopers hawk. She had taken a picture of it just hanging out on the neighbors roof, so he could see what it was..didn't see it flying around though. Of course not. They had buried the bird by then.
So what comes by my house a few days later? Yep..I got swooped down on just as I came out of my coop's run Not as low as what happened to my friend, but, I would say it was only about 8 ft. above me. Needless to say, I kept my chickens in the run for days. Silkies, can not, see above them! My other chickens can, but they usually freeze when something like that flies over head! I had Red Hawks come by, but they aren't as brazen as the Coopers when you are out there. But one day, my neighbor heard a lot of chicken noise going on while I was at church. He comes out to look, and there was a huge hawk stuck on top of the chicken wire. He said he couldn't believe the span of the wings on that thing. Had to be a Red Tail. The Coopers are smaller, but stubborn! Read a bit up on them if you have a min. Unbelievable.
Wow they don't seem to have much fear! He really wanted his meal. I read on here one lady had her hen taken just 10 feet from her! I'm saving up to enclose the orchard, I know it will be spendy but the chickens and I both will enjoy it.
I see a lot off red tailed hawks here and there's a smaller hawk around that I've seen get birds around the feeder it might be a coopers.