We bought a wren house a number of years ago and finally put it up this spring at the new house. It didn’t take long before we had a pair of wrens move in and start decorating. 
I love their musical chatter in the trees.
Eventually, there were baby wrens to feed.
Mom and Dad are constantly on the move, and haven’t seemed too bothered by our puttering in the back yard.
I don’t know how many wrens are in the box, but I’m hoping to see them as they learn to fly.
Mark
I love the little house. Wrens are my favorite.