Also this house offers no protection from owls. Owls will actually reach right in at night and grab them. Also need to address snakes climbing the pole. Yes, they can and will climb the pole. Snakes can smell them eggs a mile off.FWIW, I just ordered this package...
https://www.bestnest.com/bestnest/RTProduct.asp?SKU=BN-AH-12D-KIT2