I presently have an incubating female on a clutch of 3 white eggs. 4-5% of bluebirds will lay white eggs–generally just as fertile and healthy as blue eggs. See the Sialis.org site here for more information on why a bluebird will lay white eggs: http://www.sialis.org/whiteeggs.htm

First white eggs I've seen since I started bluebirding in 2006. Do check out the explanation why this happens on the Sialis.org website (thanks, Bet!)
I am so glad that I found your site I was worried that maybe a sparrow laid eggs in my bluebird box.
Thank you!
LikeLike
Thanks for your nice note. Good luck with all this season.
LikeLike