McNicholl, Martin K., Peter E. Lowther, and John A. Hall. 2001. “Forster's Tern (Sterna forsteri).” 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/forter doi: 10.2173/bna.595