You know, I had that kind of thing going on, I'd walk out underneath a tree and it would be raining feathers. A pile of feathers here, a pile of feathers there, and sometimes just raining feathers. I thought, my God, what is doing that? A raccoon? One day the answer came, I saw a sparrow hawk fly into our hedges, practically swimming in there trying to catch a small bird. He went in and out of there several times taking small breaks on the tailgate of our old truck. He eventually got his prey.
I saw it happen once again in a rose of Sharon bush. A smallish bush at the time but it was like an Indy 500 chase throughout that bush to catch a small bird and he did. Bushes and trees are his specialty. A little bird goes in there thinking he is saved but no!
I noticed one other rather sneaky tactic of the sparrow hawk. He likes to do his hunting right at dusk when the birds are going to roost. These things are amazing hunters and have even made my chickens squeamish. I think they could be a small worry for them. However, now I have some smaller breed chickens in addition to some larger ones. I suppose even he could be a problem. However, he is very adept at catching small wild birds so I don't think they'd ever get hungry enough for my chickens. I won't get any of them a chance though!