Parsons, Katharine C., and Terry L. Master. 2000. “Snowy Egret (Egretta thula).” 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/snoegr doi: 10.2173/bna.489