Johnson, Kristine, and Brian D. Peer. 2001. “Great-tailed Grackle (Quiscalus mexicanus).” 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/grtgra doi: 10.2173/bna.576