I had the same problem only now with great horned owls perching in my yard at night.Hawks I do know fear crows,a crow will run one off fast.
Are Hawks Afraid Of Owls?
There is not any evidence or research which shows that hawks afraid from owl. However, the Northern Hawk Owl is a crow sized owl that acts more like a hawk. So they have things in common. You have to think some other plan for the hawk. It is known that many of the big bad hawks are afraid to fly over water.