Twedt, Daniel J., and Richard D. Crawford. 1995. “Yellow-headed Blackbird (Xanthocephalus xanthocephalus).” 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/yehbla doi: 10.2173/bna.192