I also advise not to clean out the box. It is illegal to remove eggs and nesting material btw. Are the sparrows still around? Maybe they are harassing the EABL pair and causing her to delay laying. This could also be the females first nest and she isnt playing by the rules. The weather can also delay egg laying if it is cold. Keep an eye on the situation the next few days an hopefully she continues to lay. You could pair another box to keep the HOSP distracted until she finishes laying. Once she has finished laying and starts incubating, I would put the sparrow spooker back on. Good luck and keep us posted!

Sounds like you really have some challenges. You have my sympathies! A tiny poked hole is more likely a house wren's thin sharp beak, sometimes taking them some distance away, or simply tossing them out. The house sparrow will toss the eggs out, but their finch-like beak would not as likely make a tiny poke hole. And the HOSP is more likely to stick around, harass, or even take over the cavity. "Do BB's destroy their own eggs" ... No "the nest possibly could have been flooded?" ... are there leaks that could be fixed? "Are the HOSP really sneaky" ... yes, but HOWR are sneakier ... "and resistant to the Sparrow Spooker?" ... yes, and house wrens will not be deterred by a sparrow spooker. House Wrens are even sneakier, faster and silent, leaving no evidence behind, only destroying eggs or young. You might hear them singing, but might never, ever see them! There are some links to sound files of house wren song and chatter on Bet's web pages, so you can learn to hear the unwelcome sounds of house wrens. Visit Bet's web page for more info. And by the way, the Carolina Wren is a very different bird, welcome almost anywhere; not a threat to other birds. BlueBars Here is a link that might be useful: http://www.sialis.org/index.html

Remove the nest and clean out the box. I do this the very day the babies fledge. Hose it out, then scrub with water and a little bleach, and rinse again. This will take care of any possible parasites, etc. Leave the door open for a day to let it dry completely. Hopefully, Mama will start a new nest pretty soon. Last year, my Mama blue began her 2nd nest 13 days after the first brood fledged. This year, she waited a little longer. The babies fledged on 5/2 and today she laid her 5th egg! Congrats and I hope you have more little blues soon! Donna

Thanks for your support, guys, I REALLY appreciate it. The nestlings are about 11 days old now, so they will be fledging in about a week. I think it might just be best to leave them as they are and try not to disturb them too much by installing more baffles nearby. In all honesty I have been praying every day for them to stay safe, and they have, and I will continue to do so. Over the years, many sparrows have nested in this location before I became obsessed with Blues, and I have NEVER seen a cat/raccoon/snake climb the swing (everybody knock on wood for me please). As soon as the babies fledge, I am planning on moving the box to a baffled electrical conduit pole, and hoping for a second nesting! Thanks to everyone and happy birding.