Gross, Douglas A., and Peter E. Lowther. 2011. “Yellow-bellied Flycatcher (Empidonax flaviventris).” 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/yebfly doi: 10.2173/bna.566