A screech owl trilling in the half-dark sounds thinner and more uncertain than usual—a juvenile, perhaps? When it fal...

A screech owl trilling in the half-dark sounds thinner and more uncertain than usual—a juvenile, perhaps? When it falls silent, a whippoorwill calls, sounding equally tentative, and soon stops. From the woods’ edge, the soft calls of all-night migrants dropping in to rest and forage.