I have had that experience too, the swooping of the hawk.
Maybe everyone does, but my ex made the comment, "Everytime I drive with you there's either one above us or keeping pace along side of the car.
I thought you might have more than one baby up there. I'll bet the more you watch them, their personlities will come to surface and their names will come to you. Like "Runs with hidden talon..." or "Keeper of nest all to self"