I wanted to check, I don't know if the following sources are reliable: http://www.ozarkbisons.com/aboutbison.php http://www.ozarkbisons.com/aboutbison.php "Tab

I wanted to check, I don't know if the following sources are reliable: http://www.ozarkbisons.com/aboutbison.php http://www.ozarkbisons.com/aboutbison.php "Table : before 1800 60 million bisons in North America" https://www.nass.usda.gov/Newsroom/2021/01-29-2021.php https://www.nass.usda.gov/Newsroom/2021/01-29-2021.php "There were 93.6 million head of cattle and calves on U.S. farms as of Jan. 1, 2021, according to the Cattle report published today by the U.S. Department of Agriculture’s National Agricultural Statistics Service (NASS)." I didn't find number for ruminant megafauna in prehistoric times.