Drat!!!

It's always something, isn't it? I looked up some wren information online and it's apparent that the current female who is building a nest in the wren house is a house wren, unlike the first one whose brood fledged recently. She was a Carolina wren according to the photos I found. This one, being a house wren could be a threat to future bluebird nestings if she stays around the area. I understand that this variety will puncture other bird's eggs and render them useless. I am just heartsick about this. House wrens are among the "protected" varieties (I don't know why) so I can't destroy the nest she has begun to build, but I do hate providing nesting space to a bird who might destroy the eggs of my bluebirds I love so much. Nothing I can do at this point, but as soon as this brood of wrens fledges, the wren house comes down! Be sure to click on the photo so you can get a good look at her mess.