Reitsma, Len, Marissa Goodnow, Michael T. Hallworth, and Courtney J. Conway. 2009. “Canada Warbler (Cardellina canadensis).” 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/canwar doi: 10.2173/bna.421