Burger, Joanna, and Michael Gochfeld. 2009. “Franklin's Gull (Leucophaeus pipixcan).” 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/fragul doi: 10.2173/bna.116