Brooding and Hatching
Set up a routine for the breeding season. Inspect the boxes at least once a week to check if there are any eggs, being careful not to disturb the female duck if she is in the box.
What normally happens is that the female will start laying an egg a day (on average). Once she has finished laying her clutch she will start sitting on the eggs on a 24/7 basis. This is the time that you should start counting the days so you can be ready for the day the ducklings hatch. A rule of thumb for most ducks is 28 to 30 days BUT it varies, so make sure you know the exact number of days for each species.