I was quite excited a few weeks ago when I checked my bluebird house at night with a flashlight and saw through the entrance some blue feathers. So the next day I opened it and there were 5 tiny, perfect light blue eggs. I'd put up this house last year but the house sparrows got to it first. I attached clear fishing lines to it (said to deter house sparrows) but I think it was too late as they'd already gotten interested in the house. But so far, this season, everything is going fine. I only hope all doesn't end in tragedy with baby bluebirds pecked to death by sparrows. That happened many years ago and so I had stopped trying to make a home for bluebirds. But maybe this year I (and the bluebirds) will finally get lucky. I sure hope so. No sign of house sparrows around the box at all. Keep your fingers crossed.
Today I opened the house and saw the newly-hatched chicks.