And just where did you come up with that "10 years" estimate? Pre 1800's estimate at 60 million and you honestly have to think about that estimate just because of the time period. But that decline was from PRE 1800's at 60 million to 1870 at 5.5 million... Now forgive me if my Math is wrong here but that is a hell of a lot longer than 10 years!

Now as to your other 100% uneducated statement, the white man decimated around 45 million of those numbers while Bovine diseases took out an estimated 10-12 million (Cattle are not native to the Americas so the white man is still responsible for that 10-12 million since they brought them over). It's pretty hard to argue with documented evidence even though many try and fail. Especially since there are literally thousands of photos documenting the many train cars loaded down with hides and the many bone piles stacked up to over 30 feet or 7 feet and 100 yards long.