* Season: They eat more in the summer when grasses are plentiful and less in the winter when food is scarce.
* Age and sex: Adult males typically eat more than females and calves.
* Physical activity: Bison that are more active will need to consume more calories.
* Availability of food: If there is a lot of high-quality forage available, they will eat more.
On average, a bison can consume:
* 10-20 pounds of grass per day.
However, this range can fluctuate significantly:
* In summer: Some studies have reported bison consuming up to 30 pounds of grass per day.
* In winter: They may only eat 5-10 pounds per day.
It's important to remember that these are just estimates. The actual amount a bison eats in a day can vary greatly.