I think if she is already building a new nest I would leave the old nest be. How deep is the nestbox from the hole to the floor? Hopefully the new nest doesn't get too close to that hole. Also make sure your pole is baffled to keep away climbing predators.

I would remove the whole nest and let her start over. If she builds a nest on top of the nest it will be to high and starlings and bluejays might be able to reach in the box and grab a baby. Good luck with this nest! Karen

Thank you Lisa. Now the parents took the mealworm and flew away, so I opened the box this morning. All babies are gone, evidently fledged. There is a half build new nest on top of the old one. I think that I will remove the old one, and keep the new one in there. I think that the new one was build by a different female, not the Mom.

Either last year or the year before I had a Bluebird and a wren trying to build a nest in the same box. First the wren and I removed the sticks, then a Bluebird started her second nesting and the wren added sticks on the layer of grass, which I again took out. I did this for a few days when finally the wren must have given up cause the Bluebird went on to finish her nest, lay the eggs and all the eggs hatched and fledged. This box was at a park near our home so I couldn't add a wren guard as I couldn't watch to make sure it was accepted. I worried all the time about them but apparently the wren must have given up. This year the BLues down there fledged their first nesting about two weeks ago. I keep checking for the next nest but so far nothing. The daddy Blue is always there when I check the nestbox though so I know they are planning another nesting only thing is I hear a wren right in the area too singing away so I am afraid he wants that box too but so far no sticks in there. Good luck, hope your wren stays away from the box now. Donna