As with just about everything in the natural world, it’s actually more complicated than we are aware...
Buffalo (or buffaloe) primarily refers to:
African buffalo or Cape Buffalo (Syncerus caffer)
Bubalus, a genus of bovines including various water buffalo species
Wild water buffalo (Bubalus arnee)
Water buffalo (Bubalus bubalis)
Italian buffalo or Italian Mediterranean buffalo, a breed of water buffalo
Anoa
Tamaraw (Bubalus mindorensis)
Bison
American bison (Bison bison), also commonly referred to as the American buffalo or simply “buffalo” in North America
https://en.wikipedia.org/wiki/Buffalo
“Of the two surviving species, the American bison, B. bison, found only in North America, is the more numerous.
Although generally known as a buffalo in North America, it is only distantly related to the true buffalo.”
https://en.wikipedia.org/wiki/Bison
Thanks! I was just kidding about Bison being real buffalo
but I had no idea there were so many kinds of water buffalo.