In North America, both “bison” and “buffalo” refer to the American bison.
Generally, “buffalo” is used informally; “bison” is preferred for formal or scientific purposes.
Varies from 3,000–4,000
• Year-round: Hayden and Lamar valleys.
• Summer: grasslands of the park.
• Winter: hydrothermal areas and along the Madison River.
• Male (bull) weighs up to 2,000 pounds, female (cow) weighs up to 1,000 pounds.
• May live 12–15 years.
• Feed primarily on grasses and sedges.
• Can be aggressive, are very agile, and can run up to 30 miles per hour.
• Two subpopulations: Northern Range and Hayden Valley
• Yellowstone National Park is the only place in the lower 48 states to have a
continuously free-ranging bison population since prehistoric times.
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