Spring with the Raptors

My dad has been observing spring raptor rituals, since he's out in the backyard with his maple syrup operation a lot. We finally decided, after looking at these spectacular raptor photos, that he's been watching a pair of cooper's hawks in their spring mating ritual. They've been calling back and forth a lot. We hear them even when we can't see them. He's observed what appeared to be show-off aerial maneuvers. Today one of them flew very low over our house, so we could clearly see his feather markings, which is what enabled us to positively identify them. Very cool to see and hear!