re: Bison hunting, I can't even imagine how many there once were, but this pic helps

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Despite being the closest relatives of domestic cattle native to North America, bison were never domesticated by native Americans. Later attempts of domestication by Europeans prior to the 20th century met with limited success. Bison were described as having "wild and ungovernable temper";[34] they can jump 6 feet (1.8 m) vertically,[35] and run 35–40 mph (56–64 km/h) when agitated. This agility and speed, combined with their great size and weight, makes bison herds difficult to confine as they can easily escape or destroy most fencing systems, including most razor wire.

There are approximately 500,000 bison in captive commercial populations (mostly plains bison) on about 4,000 privately owned ranches. [36] Under the IUCN Red List Guidelines, commercial herds are not eligible for consideration in determining a Red List designation, therefore the total population of bison calculated in conservation herds is approximately 30,000 individuals and the mature population consists of approximately 20,000 individuals. Of the total number presented, only 15,000 total individuals are considered wild bison in the natural range within North America (free-ranging, not confined primarily by fencing).[37]

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