We visited for about a half hour and watched the nest carefully. there was no sign of an occupant. Same was true on March 8th around 10:00 AM. No adults in sight. Phil Martin goes by and checks quite often, as does Liza, but neither have reported the female on the nest except for this past Thursday, March 5th.
Please post any sightings and watch the nest closely for at least 20 minutes before concluding it is not occupied.