Another Walk: House Wren Looks to Evict Bluebirds

I mentioned that in my walk in the Habitat this week that the male bluebird was defending the nest in the bird box from a house wren. So here are some more photos of the encroaching wren.
Each time that the bluebird would chase the wren, the wren would leave and return as soon as the bluebird was out of sight.
Of course, I noted last year that the house wren is known to evict birds from the box.