I hate Buffalo gnats! Relentless biting jerks!We have raccoons. I see tracks around the pond daily and my husband killed a sick one a few weeks back.
We haven't seen any other predator in a while, unless you count the nasty buffalo gnats that killed one of my brahma hens a couple of weeks back.
I also had a young hen who kept getting onto the roof of our travel trailer. She jumped off one day and broke her neck. A shame, she was a sweet olive egger, but not so smart.
When I lived in Indiana I bought vanilla car hang ups for the coop. Or make some of your own real vanilla extract. Pretty easy to make. Vanilla beans soaked in cheap booze. Lol
Avon skin so soft helps keep them away too. You can dilute it down with water in a spritz bottle.