9 of the 10 nest boxes with Tree Swallows nestlings fledged between July 11 thru July 15th in my backyard. 3 boxes had one egg and 1 box had three eggs left after nestlings fledged. 4 other nest boxes were never used this breeding season. Today nest box #10 the first egg hatched this afternoon. Nestlings should fledge in 16 to 24 days.