I have three boxes so far with third-brood bluebird nests and egg laying! We’ll see if they can survive the continued heat we’re having here. I have had one year with one box that had a third brood successfully nest and fledge babies this late. This is interesting to me. My theory is: in spite of the late start due to the harsh winter we had, Spring came in fast and warm and the birds started their nesting cycle and incubation earlier and faster than before. Another thought is these bluebird adults are more fertile than others in years past.
Also, good news in the test site box “two-hole mansion” on my trail….the bluebird babies just fledged either on Day 19 or Day 20–Saturday afternoon or sometime on Sunday morning or afternoon, July 24th or 25th. We’ll see if another nesting will be attempted there. See my final notes on the “2-Hole Test Box” page, updated today, July 28th.