Nests and breeds in colonies with other herons. The Bay’s largest breeding colony is on Fishermans Island at the mouth of the Bay. Other colonies are located near Baltimore Harbor, Mobjack Bay in Virginia, and on islands near Tangier and Pocomoke sounds.
May begin breeding as early as February. New breeders continue to arrive at the colonies through the end of April.
Males perform several breeding displays to attract a mate
Builds a platform nest of sticks in a tree. One tree can have more than a dozen nests in it.
Females lay 3-5 eggs from mid-March to late April. Most eggs hatch between late April and late May.
The young fledge after about six weeks
Most herons leave the breeding colony between mid-August and October
If disturbed, young black-crowned night herons may regurgitate their food onto the intruder.