The Texas Gray Wolf
It could once be found from southeastern New Mexico throughout central Texas, all the way down to the Mexican border and into Louisiana.
On average, they had a small to medium build. Though they were not quite as small as the Mexican wolf. Most were of a rather dark color, though some specimens have shown that they were occasionally white.
Bison made up a large portion of its diet until the herds of bison were wiped out. So, when the wolves were forced to switch over to feed on cattle, they were intentionally driven to extinction.
Though the Texas Gray Wolf is considered by many to be a distinct subspecies, other versions of wolf taxonomy recognized the subspecies as belonging to either Canis lupus baileyi or Canis lupus nubilus. As stated above, they became extinct just 5 years after first being recognized as a separate subspecies.