Cold and clear at dawn. At one point a whippoorwill, screech owl and Carolina wren are all calling at the same time. The owl persists for another five minutes, trilling at the woods’ edge. Then a drumroll from a pileated woodpecker, and it is day.

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.