Dorr, Brian S., Jeremy J. Hatch, and Datlaf Vaughn Weseloh. 2014. “Double-crested Cormorant (Phalacrocorax auritus).” 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/doccor doi: 10.2173/bna.441