Size: Male bison (bulls) are significantly larger than females (cows). They can be twice as heavy and stand taller.
Horns: Bulls have larger, thicker, and more curved horns than cows. These horns are used for fighting other bulls and for defending the herd.
Body Shape: Bulls tend to have a thicker neck and chest, and their shoulders are more pronounced.
Behavior: Bulls are generally more aggressive, especially during mating season. Cows are typically more docile and protective of their calves.
Role in the Herd: Bulls are responsible for protecting the herd and leading it to food and water. Cows are responsible for raising calves.
Other Differences: Bulls have a thicker mane of hair around their neck, and their coats tend to be darker than cows'.
It's important to remember that these are general differences. Individual bison can vary in size and appearance, and there may be some overlap between the sexes.