We were gone for ten days after Mama II began incubating four eggs that are her third clutch this season. She began incubation on Independence Day and obviously we weren’t here on the hatch date. My bluebird eggs normally hatch in 13 days, so assuming that was the case this time, the eggs would have hatched on 17 July. The babies in the photo are about a week old.
When we got home, I looked out the back window and could see Mama’s head sticking up in the hole on the nest box in a familiar posture that means she is incubating. I guess she would sit on these eggs forever if I didn’t remove them. So just two babies again. These should fledge around 03 August. I’d just as soon the bluebirds don’t
Click photos to enlarge.
attempt a fourth nesting in the hottest part of summer, but my guess is they will. The whole nesting/rearing process takes a toll on the adults over a season. They are noticeably thinner and worn looking.
If you haven’t discovered the Sialis website, you should check it out. The largest collection of bluebird info I’ve found. Here is a link to their links page, should be able to answer about any question you have from here. http://www.sialis.org/forumlinks.htm
Total bluebirds fledged from this nest site since 2009 is 55.
2014 Third brood summary
- Nest building iniated 26 June
- Nest completed 29 June
- First egg 30 June
- Second egg 01 July
- Third egg 02 July
- Fourth egg 03 July
- Incubation begins 04 July
- Estimated hatch date 17 July