Hi Dibby:
I am fairly new here too, and had my first nest box and first pair of BB’s this past summer. Only one brood, but after the first ones hatched Mama BB disappeared, and Papa worked his feathers to a frazzle feeding his babies and all 4 fledged right before the 4th of July. We had to leave to go to our cabin, company coming so I never got to see what happened to them after that.
I had a pair show up over a month ago here in Western PA. He checked out the one box, ate a few mealworms and away they went. I have not seen a single BB around the boxes since. Maybe they flew off to Maine. I am happy for you and keep my fingers crossed that there is still time for them so show up in my neck of the woods.
Welcome to the group.
Connie (Sassy)