I use scare tape and it seems to keep away flying predators from our land area where our chickens roam.
I also use "NiteGuard" for predators. I know alot of people roll their eyes and think it is all hype and a rip off but it seems to be working for us so far. I have 2 levels of perimeter niteguard boxes on a post. It is right in front of my coop and run. We are right smack dab in the middle of forest on all sides so we have many many predators. Wolves, coyotes, skunks, porcupines, bear, deer, racoon, marten, etc. I know it has only been 5 weeks since my girls went out to the coop but so far no signs of predators trying to get in to the run/coop. My girls free range during the day but i lock em up at night. Knock on wood...but it is working so far and right now is the season all the babies have been born of the predators. I guess the theory behind the niteguard boxes is the predators think the blinking red lights are eyes so they stay away. And it can be seen a half mile away. You just have to set it up on different levels for different size predators.
I still have to figure out our snapping turtle problem though, lol.