Many years ago, I hunted with a buddy that called crows in Michigan. Not easy to do. One day he brought along a stuffed owl. I have never seen birds go crazy like that! One almost took my head off when I was in a bush near the owl.
Another time I noticed, even though we were very rural, once in a while a land owner would come out to see what we were doing. Almost every one said to go ahead when they found that we were after crows.