The Bison are large mammals. They are nomadic grazers. Travelling in large protective herds they are often avoided by predators.
They eat mostly grasses. If they find a small enough tree they will push it down to eat the leaves and bark. Small bushes are are eaten when little grass is found; such as in winter.
The Bison have split off into two groups: wild bison and domesticated domesticated Bison. The Domesticated bison are smaller. They have yelllow to white humps. They're smaller, and have a strenghtened herding instinct.