miyahuatototl.

MIYAHUA-TŌTŌ-TL, literally, “maize tassel bird”/XOPAN-TŌTŌ-TL, literally, “summer bird,” Lesser Goldfinch (Spinus psaltria) [FC: 52 Miaoatototl]: “Also its name is xopan tototl. It is small, round, dark yellow. It has a song; it is a singer. It gladdens one; it makes one rejoice. It is small, tiny, minute.” I believe this most likely refers to the Lesser Goldfinch. The description fits and this equivalence is reminiscent of how the Lesser Goldfinch is named in the Zapotec language in San Juan Mixtepec of the Sierra de Miahuatlán, Oaxaca (Hunn 2008).
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 11 – Earthly Things, no. 14, Part XII, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1963); Eugene S. Hunn. A Zapotec Natural History (University of Arizona Press, Tucson (2008); and, and, with quotation selections, synthesis, and analysis here also appearing in E. S. Hunn, "The Aztec Fascination with Birds: Deciphering Sixteenth-Century Sources," unpublished manuscript, 2022, cited here with permission.

The Digital Florentine Codex offers this translation for the bird's name as Townsend's warbler. One can also find a painting of this bird on that folio.
Digital Florentine Codex/Códice Florentino Digital, edited by Kim N. Richter and Alicia Maria Houtrouw, "Book 11: Earthly Things", fol. 56r, Getty Research Institute, 2023. https://florentinecodex.getty.edu/en/book/11/folio/56r/images/0 Accessed 21 October 2025.

miahuatototl (noun) = a bird
Daniel Garrison Brinton, Ancient Nahuatl Poetry: Containing the Nahuatl Text of XXVII Ancient Mexican Poems (1877), 157.