I have been having a bit of trouble with an Owl and A Red Shouldered Hawk. I read Plenty on the internet and from BYC about how to keep them away. I have the Owls schedule down,so its not too much of a problem now,but the Hawk is a different story. Until two days ago. I heard a huge ruckus outside the other morning. I took a look out to see Crows dive booming A Hawk! They chased the Hawk from the yard. I read Crows hate Hawks and Owls. So I did my research. I read what each Crow call means. This morning I tested my theory. I used YouTube for the crow call that's called "rally cry" Then I played the "predator cry" They ALL came to investigate! Little did I know But a Hawk was in the tree top a few yards from my chickens. The Crows,around twelve, chased the Hawk away. So Moral of story: I'm learning how to Crow call. So when I need an "Eye in the Sky" I can call the crows. I know crows can eat baby chicks,but I keep mine in a brooder,so No worries there. I love my new friends the Crows!