The first family of wrens had departed a week or so ago. This past week I noticed two sparrows going in the house and each exiting with an egg which they proceeded to drop on the ground and begin to peck. Upon investigation they appeared to be wren eggs.
Nature does what nature does in the pecking order (pun intended) but the sparrows have several other choices out and about the yard and this house is designated for wrens.
So the RG replaced the front of the house with a smaller wren sized hole