Buehler, David A., Paul B. Hamel, and Than Boves. 2013. “Cerulean Warbler (Setophaga cerulea).” 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/cerwar doi: 10.2173/bna.511