Morton, Eugene S., and Ross D. James. 2014. “Blue-headed Vireo (Vireo solitarius)” 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/buhvir doi: 10.2173/bna.379