The colour of the species’ eggs is a pale green-blue, and the clutch ranges from two to five. The mean dimensions of the eggs are 51.50 mm in length and 37.20 mm in width. Incubation typically lasts 21 days, and both parents help incubate and care for the young. Nankeen night heron hatchlings are altricial and fledge around six to seven weeks after birth. The chicks are aggressive to all adults, including parents, that approach the nest. They may leave the nest after around two weeks, and return to be fed. They are fed away from the nest by the third week of hatching.