Morse, Douglass H. 2004. “Blackburnian Warbler (Setophaga fusca).” 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/bkbwar doi: 10.2173/bna.102