Reply To: How many days to fledge Home › Forums › Bluebird Chatter › How many days to fledge › Reply To: How many days to fledge May 12, 2016 at 9:46 pm #1870 David in Stafford,VAParticipant mine have all (6 years) been 17 days (with 1 egg going 18). David Stafford, VA