Bocetti, Carol I., Deahn M. Donner, and Harold F. Mayfield. 2014. “Kirtland’s Warbler (Setophaga kirtlandii).” 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/kirwar doi: 10.2173/bna.19