Mazur, Kurt M., and Paul C. James. 2000. “Barred Owl (Strix varia).” 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/brdowl doi: 10.2173/bna.508