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July 27, 2026Sources cited
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Science & Nature • Mammal

American bison

The American bison (Bison bison) is a large North American mammal in the family Bovidae, commonly called buffalo.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

The American bison (Bison bison) is a large North American mammal in the family Bovidae, commonly called buffalo. It is the largest land mammal in North America and is native to grasslands and prairies across the continent. The species was named the national mammal of the United States in 2016 and is currently listed as Near Threatened.

Taxonomy and naming

The American bison is a species of bison in the family Bovidae and is scientifically named Bison bison. Although often called buffalo, that name is common usage rather than the formal common name.

Physical characteristics

American bison are massive, shaggy mammals with large heads, curved horns, and shoulder humps. Adult males are much larger than females and can weigh more than a ton.

Habitat and range

Historically, American bison ranged across much of North America, including what is now Canada, the United States, and parts of Mexico. Today, their range is far smaller and is shaped by land use and wildlife management.

Conservation and recovery

Bison populations were driven to near extinction in the 1800s, then rebuilt through protection, captive breeding, and managed herds. The species is now considered Near Threatened, with many individuals living in commercial or conservation herds. Wood bison are an important conservation and cultural species in northern Canada.

Cultural significance

American bison are strongly associated with the North American Great Plains and have major cultural significance, including to Indigenous peoples and as a symbol of the American West. The United States designated it as its national mammal in 2016.

Key facts

  • The American bison is the largest land mammal in North America.
  • It is native to North America and is the only wild cattle species native to the continent.
  • The species was reduced to very low numbers in the 19th century but has recovered through conservation.
  • There are two recognized North American subspecies: plains bison and wood bison.
  • Most bison today are privately managed livestock rather than free-roaming wild animals.
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Canadian context

American bison are native to Canada as well as the United States, and wood bison are an important conservation and cultural species in northern Canada.

Frequently asked questions

What is the scientific name of the American bison?
Its scientific name is Bison bison.
Is the American bison the same as a buffalo?
In common usage, yes, but the formal name is American bison. The term “buffalo” is widely used as a nickname.
How large is an American bison?
It is the largest land mammal in North America. Adult males can weigh up to about 2,200 pounds and stand about 6 feet tall at the shoulder.
Where do American bison live?
They are native to North America and live in grasslands and prairies, with many populations now on protected lands or managed herds.
What is the conservation status of the American bison?
The species is listed as Near Threatened.
How many subspecies are recognized in North America?
Two are recognized: the plains bison and the wood bison.

References

  1. PBS Naturehttps://www.pbs.org/wnet/nature/blog/american-bison-fact-sheet/
    Supports: Scientific name, taxonomic classification, Near Threatened status, and population/management context.
  2. National Wildlife Federationhttps://www.nwf.org/Educational-Resources/Wildlife-Guide/Mammals/American-Bison
    Supports: Largest terrestrial animal in North America, native wild cattle species, and size information.
  3. The Nature Conservancyhttps://www.nature.org/en-us/get-involved/how-to-help/animals-we-protect/american-bison/
    Supports: Conservation status, general population context, and herd structure.
  4. U.S. National Park Servicehttps://www.nps.gov/subjects/bison/bison-facts.htm
    Supports: Historical range, subspecies, and general facts about bison in North America.
  5. U.S. Department of the Interiorhttps://www.doi.gov/blog/15-facts-about-our-national-mammal-american-bison
    Supports: National mammal designation in 2016.
  6. Encyclopaedia Britannicahttps://www.britannica.com/animal/bison
    Supports: Genus-level classification and distinction between American and European bison.