A red-tailed hawk rose high on an air current, calling out shrill, sequential rasps of raptor joy. She scanned the sky for another one. Usually when they spoke like that, they were mating. Once she’d seen a pair of them coupling on the wing, grappling and clutching each other and tumbling curve-winged through the air in hundred-foot death dives that made her gasp, though always they uncoupled and sailed outward and up again just before they were bashed to death in senseless passion.