In a sloping green bowl of earth in the Shenandoah Valley, Leigh Ann Beavers listens to the vibrating dawn chorus, her head still resting on her pillow. Above the roof of her clapboard German farmhouse in Raphine, Virginia, a raven and a red-tailed hawk each protect their young, chasing each other across the nine acres dotted with native oaks, black walnut, and witch hazel. Outside the bedroom windows,