Fledge day in WV

I went outside for the 10 minutes it stopped raining today and couldn't believe it - I saw phoebe, indigo bunting and about 20 bluebird fledglings. I never thought I would see so many bluebirds in the same place at one time. I literally could not turn without seeing bluebirds - it was amazing! And the weird thing is my dad has no idea where they nest - every year they check out the nest boxes but don't use them.