Davis, William E., Jr., and James A. Kushlan. 1994. “Green Heron (Butorides virescens).” 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/grnher doi: 10.2173/bna.129