AI rendition based on witness descriptions, not an actual photo.
A puma in the Sierra de Manantlán, Mexico; the one onza specimen tested proved to be a puma (this is not that specimen) · Juan Pablo Esparza · CC BY-SA 4.0 (via Wikimedia Commons) · Image source · License
A legendary cat species of Mexican folklore.
DisputedVerdict: Onza is unconfirmed, and ordinary explanations fit the reports at least as well as an unknown animal.