Hothem, Roger L., Brianne E. Brussee, and William E. Davis Jr. 2010. “Black-crowned Night-Heron (Nycticorax nycticorax).” The Birds of North America, edited by Paul G. Rodewald. Ithaca: Cornell Lab of Ornithology. Retrieved from the Birds of North America: https://birdsna.org/Species-Account/bna/species/bcnher doi: 10.2173/bna.74