mazatl (Mdz47r)
This element has been carved from the compound sign for the place name, Mazatlan. It is the head of a deer in profile, facing right. The coat of the deer is mottled and painted brown. Its chin is white, as are its visible teeth. Its antlers are painted a turquoise blue, the same color as water (atl), which is also how the name ends (-atl).
Stephanie Wood
The turquoise-colored antlers are owing to the fact that the deer is metaphorically called "acaxoch," or reed flower, according to Gordon Whittaker (Deciphering Aztec Hieroglyphs, 2021, 96).
c. 1541, but by 1553 at the latest
Xitlali Torres

deer
Codex Mendoza, folio 47 recto, https://digital.bodleian.ox.ac.uk/objects/2fea788e-2aa2-4f08-b6d9-648c00..., image 104 of 188.
The Bodleian Libraries, University of Oxford, hold the original manuscript, the MS. Arch. Selden. A. 1. This image is published here under the UK Creative Commons, “Attribution-NonCommercial-ShareAlike 3.0 License” (CC-BY-NC-SA 3.0).