Why do they still call them buffaloes?

[ggg-2 3,553]

Ever since Over A Barrel, they've consistently called the tribe in Appleloosa buffalo. They aren't, they're bison. Bison are primarily in North America and are visually similar to Chief Thunderhooves and his tribe. Buffalo are found in Africa and Asia and look similar to a wildebeest.

[Fhaolan 4,483]

The animals were called 'buffalo' in the US over a hundred years before they were renamed 'bison' to keep them distinct from the African/Asian buffalo. There's a reason there's a score of places in the States called 'Buffalo', but none that I know of named 'Bison'.  There's a lot of animals in North America that got named 'wrong' because the people naming things didn't know or didn't care about 'proper' taxonomy. The American Robin, for example, is actually part of the thrush family while the European Robin is a flycatcher. The American Buzzard is part of the condor family, while the European Buzzard is a large family of birds closely related to eagles and hawks. Both are also called Vultures as well.