March 29, 2011
PM, T=75 F, humid, intermittent pitter-patter of rain, with approaching cold front.

The night is again full of buzzing june bugs, katydids, and geckos (chuk-chuks).
8:08pm. An owl appeared in the driveway hackberry tree, mid-canopy. Within a half a minute we heard both the M and F trill, though we had pin-pointed only one.
The F owl flew from the hackberry farther down the driveway.
8:20pm, male owl flew to the Boy box, entered, and gave a short round of box calls there, oddly, ending in a monotonic trill.
8:21pm, female owl flew back up our driveway to a perch high in the western branches of the hackberry above the shop, not a usual perch. She stayed there for at least 3 minutes, listening while the male owl left the Boy box for the nest box, and gave a bout of box calls and monotonic trills from inside. He left and flew up into the high canopy of the hackberry.
So the female entered the nest box, fluffed the shavings on the floor, and exited again, flying east of the shop.
Based on the fact that the male keeps advertising the nest box, and the female continues to visit and fluff the shavings, we think it unlikely that they have already nested somewhere else. So the question is: why is nesting so late, compared with previous years? Is it because the male is new and possibly inexperienced? Or that the female is old and more prone to lay infertile eggs, or none at all?