When we made our first birdhouse in a new place there was not many birds around. It was a beginning of December and after one month I didn't really believe that finally any bird will find here sth good for itself. And when one day first lonely aviator appeared it was a great happiness:) At the beginning of spring our guests were starlings, and later their place took chickadees, white-faced jays, sparrows and even pigeons:) House and terrace become alive when you can hear birds singing in the morning. Try yourself!
Thank you & best wishes!