i've never seen cooper's going after squirrels around here. they prefer doves and pigeons who don't have rodent teeth and claws to put up a significant fight.
bigger raptors, probably. squirrels are definitely afraid of red shouldered hawks, because Jays mimicked them to scare squirrels and others away from my peanuts as i tossed them awhile ago.
all squirrels instantly vanished, up trees over fences, GONE. jays enjoyed many peanuts.
@holon42
Thanks! We do have a population of mourning doves in the area. And field mice, of course