@andyd
Andy, we have lots of wrens here, too. Every year we have at least one pair that nest in our yard. Their song is one of my favorites.
They're so tiny, yet fierce in protecting their nesting area. When we get too close they start hollering. For a small bird, they can be quite vocal. 😄
That reminds me that it's time to add a couple new nesting boxes for them, to gradually replace ones that are worn out from years of use and weather. We repair the birdhouses as long as we can, because they seem to like having the familiar boxes from year to year. Eventually, there's no fix left except replacement. It seems to help to have the new ones out for a year to let them age or weather a bit, and then the birds accept it as a substitute.
It helps to have several houses for them, and the males build in multiple homes. The females shop to pick one they like, and add their own touches to it. I think 89th has just gone through this, too. 😉