Breezy and cool—a distinctly autumnal feel, belied by the black walnut trees’ young leaves, not yet full size, light green against the darker forest behind them. My brother the birder hurries past, eyes darting all about.

Clearing enough by 8:00 for the sun to nest in the treetops. Highway noise subsides, giving way to the knocks and clatter of falling walnuts and acorns, the scold-calls of chipmunks, the jeers of jays.