“October’s bright blue weather” continues. As it warms up, I take great, greedy breaths of the autumn air, laden with geosmin and other earthy compounds associated with fermentation and decay. A mid-morning blast from the limestone quarry two miles away shakes the house.

The rising sun appears through new holes in the forest understory just after it tops the ridge. Crows and jays are in an uproar over a young peregrine falcon, who hangs around for a couple of hours, periodically giving chase to its most obnoxious persecutors until they all find better things to do elsewhere.