Clear and still, with patches of light frost. The sky has made considerable inroads into the forest just since yesterday. A jay’s waking call elicits a reply from the far ridge: softer notes at first, then the familiar jeer.

Heavily overcast: a rain sky with no rain. Up in the woods, a Cooper’s hawk begins to chirp, answered seconds later by a red-tailed hawk. The two hawks exchange calls for several minutes before falling silent and letting the jays take over.

The sun rises an hour earlier, heralded by the usual motley assortment of sparrows, wrens and corvids. The stratosphere breaks out into a rash of clouds.