Kus, Barbara, Steven L. Hopp, R. Roy Johnson, and Bryan T. Brown. 2010. “Bell's Vireo (Vireo bellii).” 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/belvir doi: 10.2173/bna.35