Evers, David C., James D. Paruk, Judith W. McIntyre, and Jack F. Barr. 2010. “Common Loon (Gavia immer).” 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/comloo doi: 10.2173/bna.313