Crows (American) are abundant in my area as are trees on a good 1/3 of my property. Closest breeding group of crows I know of is about 400 yards away and trees in that location are very similar to those I have have. The crows have been nesting their for at least 3 years and have a red-shouldered hawk nesting very close to them. The two species likely help defend each others nest from nest maurading great horned owls and red-tailed hawks. Something is special about that location otherswise I do not understand why they would not move over near me. The crows did steal a few dominque eggs until a game rooster was released but the red-shouldered hawk causes no damage even when hunting my pasture so both species would be welcome.They were attached to trees. Not sure how high up, though definitely at least 30 feet.
Not saying he was expecting every nest to be occupied, but a few were. He did mention that they stole eggs from his ducks. His chickens were not free ranged. It was his geese and ducks that were. Apparently the eagles took out his African geese with ease.