There are certainly more recent records.. https://www.businessinsider.com/skulls-photo-american-bison-extinction-history-2016-4 https://www.businessinsider.com/

There are certainly more recent records.. https://www.businessinsider.com/skulls-photo-american-bison-extinction-history-2016-4 https://www.businessinsider.com/skulls-photo-american-bison-... >In 1800, it was estimated there were forty million bison, by 1883, there were few wild bison in the United States - most were in Yellowstone National Park. By 1900, there were less than a thousand left in North America.