Crows In, Predators Out

Country diary: carrion crows construct their high-rise abode | Birds | The  Guardian

Jambo, Mr. Nature here! And I haven’t seen any predators in our neighborhood lately. Especially hawks. Where have our hawks gone?

Well, we now have crows. Lot and lots of crows. And crows don’t like predators. Instead of just putting their names on a registry, the crows chase them out. This seems to work very well. Maybe the crows are smarter than we are.