Well you'll get to see if the air sac has dipped that will tell you something. And you can smell and listen to the egg. May not see movement since the ducklings would take up most of the egg by now. Are you sure no eggs were laid at a later date so you'd have some late hatchers? Plus if ducklings were hatched on July 2nd mamas will usually leave the nest around day 3 of hatching so they may save you any trouble of making them get up. I'd sure still candle and listen even if they leave the nest just to make sure you don't have any late hatching.
