We've got tons of hawks here on these ridges, as well as nesting pairs of eagles....
and yeah, you can hear the difference when they're at work.
I've only seen one actually come swooping down at me (whilst on the tractor, no less) though -
and it was an eagle.
My first thought was "dude's gotta be nearsighted - and starving", but it then occurred to me that
it was probably more of a protective dive. Sure enough, I was working close to an old barn next
door - and they had a nest working in there.
My bad...