Nolan, Val, Jr., Ellen D. Ketterson, Dan A. Cristol, Christopher M. Rogers, Ethan D. Clotfelter, Russ C. Titus, Sara J. Schoech, and Eric Snajdr. 2002. “Dark-eyed Junco (Junco hyemalis).” 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/daejun doi: 10.2173/bna.716