Hi Ann I so hope you get a nest. Moss indeed! I can only dream at the moment. My sparrows are regular visitors but no nest to speak of yet. Bluetits have been popping into to a couple of my boxes but they really prefer the one the sparrows are defending and keep coming to the entrance but are usually scared off by the sparrows who are rarely far away. I even have a great tit interested in that box Time will tell haha. Good luck for the old roller coaster ride
Dust if you must but wouldn't it be better To watch the birds ...........