When I came home this afternoon and checked my email there was an email and photo from David. "Good News" was the title. I might have gone so far as to say Very Good News!
I picked D up from the airport this morning after his overnight flight from Buenas Aires. No sooner home than out in the garden looking for jobs! As he glanced up at the owl house he spotted the new resident. So the earlier ant invasion, that David took care of, did not deter him. I don't think there are any leaves in there for a soft nest but you never know, maybe it is just more than a daytime roost.