I think a lot depends on natural feed for the redtails, too. Every year they nest in the trees at the edge of my pasture, but I have never lost a chick, duckling, poult, kitten... anything to the redtails. But we do have lots of bunnies around here, and maybe the redtails are used to eating them and leave my critters alone? I have lost birds to owls and racoons, cats to the neighbors dogs. Losing a bird now and then to a predator that actually eats it doesn't bother me as much as a racoon going in and killing everything and leaving the pieces around. I love to watch the hawks when the farmers are harvesting... they perch there waiting for critters to run. And like I said, they eat the bunnies for me! I am not a bunny fan, they do way to much damage in the garden!