On Sunday the 28th, Mrs. Owl spent all day in the box. She did give us a glimpse that clearly showed 4 eggs in the box (second photo).
In the eveing, she went up at 8pm, and left from 8:06-8:17 pm. She is taking shorter and shorter breaks.
Mr. Owl started feeding her soon after she got back. He fed her at 8:26, 8:29, 8:39 (moth), 8:48 (spider), 9:21 (lizard), 1:30am (bird). You can see the bird delivered in the first photo. We can't tell what species it is, as it is too ruffled, and is likely missing its head. She proceeded to eat it, and continued munching on it over next 1.5 hours. She received no other food deliveries until 7:06am (lizard or grasshopper).
Her morning break was from 6:06-6:12 Monday morning. Very short.
She spent all day incubating and turning the eggs, and preening, which is all she does all day.