Whitehead, Donald R., and Terry Taylor. 2002. “Acadian Flycatcher (Empidonax virescens).” 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/acafly doi: 10.2173/bna.614