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Message: <blockquote data-quote="Janx" data-source="post: 6067880" data-attributes="member: 8835">I couldn't find any proof, but a herd of a million bison sounds dubious.  Master Wikipedius does confirm that there were probably 50 million bison in North America at one time, but the probability that herds contained 1million or more at a time strikes me as unlikely.Given cows more pokey movement while grazing, they would strip a sizable area in the FRONT of the herd before the BACK got to eat if the herd was that big.  The land just wouldn't sustain a mega-large herd as it mowed across america.I don't doubt large herds existed.  i would have liked to see some article that had some quote from a hunter with a guesstimate (that hopefully wasn't exagerated).I did learn some other interesting things:bison can jump 6 feetthere are multiple bulls in the herd (the alpha bull doesn't drive out all the other bulls, which would reduce herd size like other herd animals).One of their defensive patterns while fleeing wolves is to put the cows/calves in front, with the bulls in the rear to defend them from the wolves (because a bull can take out a wolf).  This is as a moving formation (not quite a stampede, but controlled rush I guess).</blockquote>