At one time bison herds roamed the plains and valleys from western [[Canada]] down to [[Mexico]]. They served an important part of [[Native American]] survival, but were almost hunted to extinction by European settlers by 1900. Conservation efforts prevented the extinction of the American bison, but herds today are rare. | At one time bison herds roamed the plains and valleys from western [[Canada]] down to [[Mexico]]. They served an important part of [[Native American]] survival, but were almost hunted to extinction by European settlers by 1900. Conservation efforts prevented the extinction of the American bison, but herds today are rare. |