Day 31 — Nest empty throughout daylight; brief overnight visits only · birbs

From midnight through ~00:20, interval clips show the cup empty. At 00:33, a bird is in the cup (sunroom_interval), but the tapo interval three minutes later shows it already gone. Two more brief occupancies follow at 02:22 and 02:38 — bird visible on sunroom_interval both times, cup empty on the corresponding tapo intervals — suggesting very short visits rather than sustained brooding.

After 03:00 the cup is empty at every interval through the rest of the overnight period and all of daylight. Motion clips at 08:46–08:47 show an adult flying away from the nest area and a male briefly present nearby; another male is seen near the nest at 09:16; a bird passes through again at 10:28. None settle in the cup. A fourth occupancy appears at 21:16 (sunroom_interval, bird in cup), with the cup empty again by 21:32. The remainder of the night is empty.

190 of 199 clips are tagged empty_nest; all 4 brooding clips fall between 00:33 and 02:38 or at 21:16. The nest sees no adult presence during any daylight interval across the full day. At 18 days post-hatch, this is consistent with fledging.

Pipeline: No infrastructure changes this day.

Day’s metrics.

Clips: 192
Sunrise / sunset: 05:51 / 20:19 PT
On-cup share: 2.7%
Dad visits: 2
Brooding clips: 4
Feeding clips: 4
Chick gapes: 0

Reolink wide-angle, 10:28 PT. The bookshelf is in frame from below; the cup is up top. A single bird drops in from the right at about t=15s, perches briefly on the dangling cable in front of the window, then leaves. None of the day-after visitors settle in the cup — the bird passes through and is gone.