During the laying period, Ma visits the nest for only about one hour per day. While there she lays an egg and works on nest construction. Don't be concerned if she skips a day. She does not incubate the eggs during the laying stage. Because no embryo development has occurred, weather conditions in her absence generally have very little effect on the clutch. An exception is a hard freeze, which may kill the embryos if it occurs before the hen has insulated the nest. Once she has constructed a nest bowl, she will cover the eggs with nest material whenever she voluntarily leaves the nest. This behavior makes the nest less obvious to predators, and protects the eggs from temperature extremes.
Incubation begins after the clutch is complete, and typically lasts for about 25-29 days. During this period she will usually cover the nest and go off to feed for about an hour each morning and afternoon. Once the duckies hatch, the walk away!!