Furthest north I’ve personally heard em is Floresville, about 30 miles south of San Antonio, and that was just one time.

They do occasionally show up in San Antonio, I would imagine a hard winter event like last year would knock them back a bit.

"...if the gentlemen of Virginia shall send us a dozen of their sons, we would take great care in their education, instruct them in all we know, and make men of them." Canasatego 1744