Mr. Bluebird seems to be getting impatient. He usually shows up around the yard a few times a day. He'll call to Mrs., she sometimes answers. Today, he stuck around the yard, often perching on the box or the roof just above the box. I saw him go to the door several times to see what was up. And, every time I was around to see Mrs. leave the box, Mr. would perch by the door. All this, and still no chicks. We're about midway through the period we can expect them to hatch. They should hatch before Monday.
The chickadees haven't checked either box at the Library in over 72 hours, it looks like they've moved on.
Here's Mrs. Bluebird tending her eggs this afternoon: