Witmer, Mark C., D. James Mountjoy, and Lang Elliot. 2014. “Cedar Waxwing (Bombycilla cedrorum).” 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/cedwax doi: 10.2173/bna.309