National Bison Day: History, Conservation & the American Bison’s Comeback

American Bison in South Dakota | Tim Malek

Few animals are as closely tied to the landscapes and history of North America as the American bison. Once numbering in the tens of millions, enormous herds moved across grasslands, river valleys, woodlands, and mountain country from Mexico into Canada and Alaska. Their presence shaped ecosystems, influenced the lives of countless other species, and played a profound role in the cultures and economies of many Indigenous Nations.

By the end of the nineteenth century, those seemingly endless herds had nearly disappeared. Commercial hide hunting, expanding railroads and settlement, habitat changes, competition with livestock, disease, and deliberate efforts to destroy bison as a way of undermining Indigenous Nations that depended on them reduced the animals to a tiny fraction of their former numbers.

The fact that bison still exist at all is therefore an extraordinary conservation story, but it is not quite the simple comeback sometimes suggested by modern population totals. Hundreds of thousands of bison now live in North America, yet most are privately managed as livestock. Only a much smaller number are maintained with conservation goals, and truly wild, free-ranging herds remain rare. National Bison Day offers a chance to celebrate how far the species has come while recognizing that restoration is still very much underway.

🦬 When Is National Bison Day?

National Bison Day is observed on the first Saturday in November. In 2026, that falls on November 7. The observance has been celebrated annually since 2012 as a way to recognize the ecological, cultural, historical, and economic importance of the American bison.

The animal received another national distinction in 2016, when the American bison was designated the national mammal of the United States. That designation placed the bison alongside the bald eagle as one of the country’s most prominent wildlife symbols.

National Bison Day is about more than symbolism, however. It is also an opportunity to understand one of North America’s most dramatic wildlife declines and the complicated work required to restore bison to landscapes where they once played an enormous ecological and cultural role.

🦬 Is It Bison or Buffalo?

Scientifically, the animal is the American bison, Bison bison. True buffalo belong to different groups and include species such as the African buffalo and Asian water buffalo.

That does not mean the word buffalo is simply wrong. People in North America have called bison buffalo for centuries, and the word has deep historical and cultural significance. The National Park Service notes that many Indigenous people continue to prefer buffalo, particularly in cultural and spiritual contexts.

That distinction makes both terms meaningful. “Bison” is generally preferred in scientific and wildlife-management writing, while “buffalo” remains deeply embedded in place names, family traditions, Tribal cultures, songs, history, and everyday American language.

🌎 An Animal That Once Spanned a Continent

Before their nineteenth-century collapse, American bison occupied an enormous portion of North America. They ranged from northern Mexico into Canada and Alaska and from western grasslands into parts of the eastern United States.

Estimates vary, but the National Park Service places their former population at roughly 30 to 60 million animals before the great decline of the nineteenth century. The largest concentrations occurred on the Great Plains.

It is difficult to imagine the scale of those herds today. Historical accounts describe bison stretching across landscapes in numbers that could take hours or even days to pass. Their movement shaped both ecosystems and human lives.

For many Indigenous Nations of the Plains, buffalo were central to food systems, economies, shelter, clothing, tools, ceremony, trade, and spiritual life. The relationship was never simply one of people hunting an abundant animal. Buffalo were woven into cultures that had developed alongside them for generations.

🪶 Buffalo & Indigenous Nations

There is no single “Native American relationship with the buffalo.” Hundreds of Indigenous Nations have distinct histories, languages, beliefs, and traditions. For many Plains Nations, however, buffalo were profoundly important.

Meat provided food, while hides could become robes, clothing, coverings, or shelter. Bones and horns could become tools and other useful objects, and other parts of the animal had practical, ceremonial, or spiritual significance. Different Nations developed their own hunting methods and traditions surrounding the animals.

Buffalo also remain important in Indigenous life today. They are not merely historical symbols belonging to the nineteenth century. Tribal Nations are among the leaders of modern buffalo restoration, returning animals to Tribal lands, rebuilding food systems, renewing cultural practices, and restoring relationships that were violently disrupted when the great herds were destroyed.

That continuing story is essential to understanding modern bison conservation. Restoring buffalo is not simply about increasing an animal population. For many communities, it is also about repairing cultural and ecological relationships interrupted by colonization and the destruction of the herds.

📉 How Did Millions of Bison Nearly Disappear?

The great bison decline accelerated dramatically during the nineteenth century. Commercial hunters killed enormous numbers for hides, meat, tongues, bones, and other products, while railroads made remote herds much easier for hunters to reach and made it possible to ship bison products efficiently to distant markets.

Settlement converted and fragmented habitat, domestic livestock increasingly occupied former bison ranges, and disease and drought added further pressure. Yet the slaughter also intersected directly with federal efforts to force Plains Nations from their lands and onto reservations.

U.S. military and government officials recognized that destroying buffalo would devastate Indigenous communities whose food systems, economies, and cultures depended upon the herds. By the late nineteenth century, animals that had once numbered in the tens of millions had been reduced to fewer than 1,000, with some historical estimates placing the surviving wild population at only a few hundred.

An animal that had seemed almost impossible to eliminate had been pushed to the edge of extinction within a human lifetime.

🚂 Railroads Accelerated the Slaughter

Railroads transformed both the Great Plains and the bison trade. New rail lines brought hunters into areas that had previously been difficult to reach and provided a rapid way to move hides, bones, meat, and other products to distant markets.

Passengers sometimes even shot at bison from trains. The combination of improved firearms, commercial demand, easy transportation, expanding settlement, and policies hostile to Indigenous control of the Plains created devastating pressure.

Mountains of bison skulls and piles of hides became some of the most haunting images of the period. The destruction happened so quickly that landscapes shaped by vast herds for thousands of years were left almost without them.

🌾 Bison Were Part of the Prairie Itself

Losing bison did not only change human cultures. It changed ecosystems. Bison are sometimes described as ecosystem engineers because their activities physically alter the landscapes around them.

They graze, move across large distances, trample vegetation, fertilize soil, transport seeds in their coats, rub against trees and shrubs, and create wallows. Together, those behaviors produce different patches of vegetation, soil conditions, and habitat across grasslands.

When millions of bison disappeared, North America lost not simply a large mammal but one of the major ecological forces that had helped shape its grasslands. Modern restoration efforts therefore increasingly focus on returning the ecological processes associated with bison rather than simply increasing the total number of animals.

🕳️ What Is a Bison Wallow?

Bison wallow by rolling and rubbing their enormous bodies against dry soil. Over time, repeated use creates shallow depressions in the ground called wallows.

To the bison, wallowing may help with shedding hair, discouraging biting insects, cooling themselves, and social behavior. To the prairie, a wallow is a small ecological disturbance.

The compacted depression may temporarily collect rainwater, different plants can colonize the disturbed ground, and insects and other animals may use the resulting microhabitat. Across a large landscape filled with bison, countless wallows help create a mosaic of slightly different conditions rather than one uniformly grazed grassland.

Some ancient wallows remain detectable long after bison disappeared from an area, providing a lingering physical reminder of where great herds once moved.

🌱 Bison Grazing Can Increase Habitat Diversity

Bison do not graze every patch of grassland equally. They repeatedly return to some areas while leaving others less heavily grazed, creating vegetation of different heights and stages of growth across a landscape.

That variation can benefit insects, birds, small mammals, and plants that depend on different types of grassland structure. Dung returns nutrients to the soil and provides habitat and food for insects and microorganisms, while seeds can become caught in a bison’s thick coat and travel to another part of the landscape before falling away.

These interactions help explain why conservationists increasingly talk about restoring the ecological role of bison, not merely increasing the number of animals. A herd behind a fence is still a herd, but a large population moving, grazing, wallowing, reproducing, migrating, and interacting with a functioning grassland can do much more.

🏞️ Yellowstone & the Last Wild Bison

Yellowstone National Park occupies a special place in bison history because it is the only place in the United States where bison have lived continuously since prehistoric times.

Even the creation of Yellowstone National Park in 1872 did not immediately guarantee their safety. Poaching continued, and by 1902, the native Yellowstone herd had been reduced to approximately two dozen animals.

Fearing that they could disappear completely, managers brought additional bison from private herds into Yellowstone and maintained a separate managed herd. Over time, those animals and descendants of the original wild population mixed.

Bison management changed repeatedly during the twentieth century, eventually shifting toward allowing natural ecological processes to play a much greater role. Today Yellowstone supports one of North America’s most important wild bison populations.

🦬 Yellowstone’s Herd Today

Yellowstone’s bison population has recovered spectacularly from its low point. The National Park Service estimated nearly 5,300 bison before the 2025 calving season.

The park’s current management plan calls for maintaining a wild, migratory population generally between 3,500 and 6,000 animals after calving.

Yellowstone’s bison are especially significant because they behave as wild animals. They migrate, choose breeding areas, and respond to weather, snow, forage, predators, and landscape conditions. They interact with wolves, bears, grasses, soils, rivers, and other wildlife.

That wildness distinguishes the Yellowstone population from the far larger number of bison raised commercially.

🔢 How Many Bison Are There Today?

This question can be misleading because the answer depends on what kind of bison you are counting.

The National Park Service estimates that approximately 31,000 bison in the United States and Canada are stewarded as wildlife in publicly owned herds, while roughly 360,000 plains bison are privately owned as livestock. Other recent National Park Service material places the broader conservation total across North America at roughly 30,000 animals, compared with approximately 400,000 raised as livestock.

The precise estimates change over time, but the larger point does not. Hundreds of thousands of bison existing on the continent does not mean hundreds of thousands of wild bison have been restored to their historic ecological role.

Truly wild animals living in large, connected landscapes remain uncommon. That is why conservationists distinguish between numerical recovery and ecological recovery.

🌎 Bison Still Occupy Only a Fraction of Their Historic Range

The species is no longer on the brink of extinction, and that is an enormous achievement. Yet the U.S. Department of the Interior has estimated that bison remain absent from approximately 99 percent of their historical range.

Many existing herds are small, isolated from one another, and enclosed. Isolation can create long-term genetic concerns, while limited habitat prevents natural migration. Small populations may also be unable to perform the broad ecological functions that millions of roaming bison once carried out across continental grasslands.

The next phase of bison conservation is therefore much more complicated than keeping the species alive. It involves restoring larger herds, preserving genetic diversity, expanding appropriate habitat, supporting Tribal restoration, maintaining wild behavior, and allowing bison to function ecologically.

🧬 Why Genetics Matter

A conservation herd is more than a collection of animals that happen to look like bison. Genetic diversity helps populations remain resilient over many generations.

Severe population bottlenecks can reduce that diversity, and small isolated herds can lose additional genetic variation over time because relatively few animals are reproducing with one another.

Historic crossbreeding between cattle and some bison herds creates another consideration for certain conservation programs. Modern managers therefore use genetics, population records, disease testing, herd exchanges, and carefully planned transfers to help maintain healthy conservation populations.

A successful bison restoration program has to think not only about the number of animals alive today but also about the health and resilience of those populations decades into the future.

🪶 Tribal Buffalo Restoration Is Part of the Comeback

One of the most significant developments in modern bison conservation is the return of buffalo to Tribal lands.

For many Tribal Nations, restoration is simultaneously ecological, cultural, spiritual, and economic. Buffalo can help restore grasslands, contribute to food sovereignty, provide hides and other materials for cultural use, and reconnect younger generations with traditions interrupted by the nineteenth-century destruction of the herds.

Importantly, Tribal Nations are not merely recipients of someone else’s conservation program. They are wildlife managers, land stewards, governments, and restoration leaders pursuing their own goals for buffalo and their lands.

The return of buffalo therefore represents more than species recovery. For many communities, it is also a restoration of relationships.

🚚 Yellowstone Bison Are Returning to Tribal Lands

Yellowstone’s Bison Conservation Transfer Program provides an especially important example of modern restoration.

Bison that repeatedly test negative for brucellosis can be transferred rather than sent to slaughter. The animals first undergo extensive testing before moving to the Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation in Montana, where additional assurance testing takes place.

From there, animals and their descendants can move to other Tribal Nations. As of 2026, the National Park Service reports that more than 600 live Yellowstone bison have been transferred to 29 Tribes across 13 states and one Canadian province since 2019.

In 2026 alone, 211 bison were moved into the program’s transfer process. Each transfer represents something much larger than moving an animal from one fenced area to another because it can become the foundation for another herd and another chapter in cultural and ecological restoration.

American Bison or Buffalo with calf | Darren Baker

🌾 Buffalo, Food Sovereignty & Culture

Restored buffalo can contribute directly to Tribal food systems. For communities whose ancestors depended on buffalo for countless generations, eating buffalo is not simply a novelty protein or gourmet alternative to beef. It can be part of cultural continuity.

Tribal buffalo programs may supply meat for elders, ceremonies, schools, community events, and families. Hides, skulls, bones, and other parts may also have ceremonial, artistic, educational, and practical uses according to the traditions of individual Nations.

The significance varies from community to community, which is why buffalo restoration is best understood through Tribal voices rather than a single generalized idea of “Native American culture.”

🏞️ Other Important Conservation Herds

Yellowstone may be the best-known bison stronghold, but important conservation herds exist elsewhere.

National parks, wildlife refuges, Tribal lands, state lands, private conservation areas, and other protected landscapes support bison across North America. Wind Cave National Park in South Dakota preserves an especially important herd, while the Henry Mountains of Utah support another notable free-ranging population.

Badlands National Park, Theodore Roosevelt National Park, Grand Teton National Park, and other protected areas also contribute to modern bison conservation, while Tribal buffalo herds continue expanding the map.

Each population has its own history, genetics, habitat conditions, management challenges, and conservation purpose. There is no single template for restoring bison everywhere.

🦬 Plains Bison & Wood Bison

The American bison species includes two generally recognized subspecies: plains bison and wood bison.

Plains bison are the animals most strongly associated with the Great Plains, Yellowstone, and the enormous historical herds of the central continent. Wood bison are generally larger and historically occupied northern forests and meadows in Canada and Alaska.

Wood bison also experienced severe decline and have been the focus of major restoration programs. Although they belong to the same species, conserving both forms helps preserve the ecological and genetic diversity that developed across very different northern and grassland environments.

🐂 How Big Is an American Bison?

Bison are the largest land mammals in North America. Adult males, called bulls, can weigh around a ton, although size varies, while females, called cows, are smaller but still formidable animals.

Their enormous shoulders are supported by powerful muscles attached to long spinal processes, creating the characteristic hump. That strength helps bison push through snow in search of buried vegetation.

Despite their size, bison can move remarkably quickly. They can run much faster than a person and pivot with surprising speed, which is why their calm appearance should never be confused with tameness.

⚠️ Bison Are Wild Animals

Every year, visitors are injured after approaching bison too closely in national parks.

A bison grazing beside a road may appear indifferent to people, but that does not mean it is comfortable with them. Bison can charge with little warning, especially when people crowd them, block their movement, approach calves, or move too close for photographs.

The National Park Service advises visitors to remain at least 100 feet, or about 30 meters, from bison. If an animal reacts to your presence, you are already too close.

Use a telephoto lens rather than approaching wildlife for a better picture. National Bison Day is a celebration of wild animals, and respecting their wildness is part of celebrating them responsibly.

🐾 Bison Calves Are Sometimes Called Red Dogs

Bison calves look dramatically different from adults. Newborn calves have reddish or rusty coats rather than the dark brown coloration most people associate with bison, which has led to the affectionate nickname “red dogs.”

Most calves are born during spring. As they grow, their coats gradually darken and they begin developing the heavier front end and shaggy appearance of adult animals.

Calves remain close to their mothers and become part of the complex social structure of the herd. Seeing a reddish calf among dark adult bison is one of the unmistakable signs of spring in bison country.

💨 Bison Are Surprisingly Fast

Their size gives bison an almost slow-motion appearance when they are calmly grazing, but that impression disappears the moment they decide to run.

Bison are capable of speeds around 35 miles per hour. They can also turn quickly and jump obstacles, making close encounters particularly dangerous.

Humans cannot outrun them. The safest wildlife encounter is therefore one that never turns into a chase, so give bison the space to decide where they want to go.

❄️ Built for Extreme Winters

Bison are exceptionally well adapted to cold weather. Their heavy coats provide insulation through severe winters, and their powerful bodies allow them to move through snow.

When grass disappears beneath a snowy surface, bison can swing their massive heads from side to side to push snow away and uncover vegetation.

In Yellowstone, winter is one of the forces that drives migration. Animals move in search of accessible forage and lower snow depths, sometimes bringing them beyond park boundaries.

Those movements are natural, but they also create some of today’s most difficult bison-management questions.

🦠 Brucellosis & the Yellowstone Challenge

One reason Yellowstone bison management is unusually complicated is brucellosis.

The bacterial disease occurs among some bison and elk in the Greater Yellowstone Ecosystem and can cause reproductive problems in infected animals. Concern about potential transmission to cattle has influenced policies governing where bison are allowed outside Yellowstone.

The result is a complicated situation. Bison naturally migrate beyond park boundaries in search of winter range, but tolerance for their presence outside Yellowstone remains limited.

Management therefore involves the National Park Service, Montana, federal agencies, Tribal Nations, hunters, ranching interests, conservation organizations, and others whose goals do not always align. This is an important reminder that wildlife conservation rarely ends when an animal’s population starts increasing.

Recovery creates new questions about where animals can live and how people will coexist with them.

🌨️ Wild Bison Need Room to Move

Migration is a normal part of bison life. Animals respond to snow depth, forage quality, water, weather, reproduction, and other conditions.

A population can be numerically healthy while still being prevented from carrying out much of its natural movement. Yellowstone itself cannot provide unlimited winter habitat for a continually growing herd.

The park’s current management plan therefore balances population size, habitat, disease concerns, Tribal treaty harvests, state hunts, transfers, and other tools.

Long-term wild-bison recovery will depend partly on whether communities are willing and able to make more landscapes available to the animals. Space may ultimately be one of the most valuable things humans can give bison.

🇺🇸 How the Bison Became America’s National Mammal

In 2016, federal legislation designated the American bison as the national mammal of the United States.

The designation recognized the animal’s extraordinary place in American history, Indigenous cultures, ecology, conservation, and national identity. It did not, however, automatically create new legal protections for wild bison.

That distinction is important. A national symbol can still face complicated habitat and management challenges.

The designation does something different by acknowledging that the bison’s story belongs at the center of the country’s natural and cultural history. Few animals could make a stronger case.

🎉 How to Observe National Bison Day

National Bison Day does not require a special ceremony. It can simply be an opportunity to learn more about the animals and the people restoring them.

Visit a national park, wildlife refuge, Tribal cultural center, museum, or conservation area where bison history is interpreted. Learn about the Tribal Nations connected with buffalo in your region, and read about modern buffalo-restoration projects rather than stopping with the familiar near-extinction story.

If you visit bison habitat, observe the animals from a safe distance and follow local wildlife regulations. Supporting reputable conservation and Tribal restoration organizations can also help expand the work already underway.

For children, National Bison Day can open discussions about food webs, grassland ecology, Indigenous history, conservation genetics, wildlife corridors, and the difference between saving a species and restoring an ecosystem.

📖 Teaching Kids the Bison Story

The bison story can be difficult because it combines extraordinary wildlife with painful human history. That is precisely why it is worth teaching carefully.

Children can begin with the animal itself. They can learn how large bison are, what they eat, why they have a hump, what a wallow is, and how an animal weighing nearly a ton can run so quickly.

From there, the story can expand into bigger questions. What happens to a grassland if millions of its largest grazers disappear? How are communities affected if an animal central to food, shelter, and culture is deliberately destroyed? What does it take to bring a species back after only a few hundred survive?

Those questions turn the bison from a symbol into a way of understanding ecology, history, and conservation.

🔭 The Difference Between Survival & Restoration

By one measure, the bison comeback is complete because the species survived and there are now hundreds of thousands of bison in North America.

But survival is only the first level of conservation.

Ecological restoration asks harder questions. Are there large enough herds to maintain healthy genetics? Can the animals move naturally? Do they occupy enough of their historic habitat? Are they shaping grasslands through grazing and wallowing? Can Tribal Nations restore buffalo to their own lands and cultures? Can wild herds expand without immediately encountering boundaries where they are no longer tolerated?

Those questions explain why conservationists still describe bison restoration as unfinished.

The goal is not to recreate an untouched nineteenth-century continent. That is impossible. The goal is to create more places where bison can once again function as bison.

🌱 Why Bison Restoration Helps More Than Bison

Returning bison to an appropriate landscape can create benefits that extend far beyond one species.

Their grazing can produce patches of vegetation at different heights, while wallows create localized disturbance and dung recycles nutrients. Their movement redistributes seeds, carcasses provide food for scavengers, birds may forage around grazing animals, and insects respond to changes in vegetation and dung.

That interconnectedness is one reason bison restoration often becomes grassland restoration. Protecting enough space for a large grazing animal may also protect prairie plants, birds, insects, amphibians, mammals, and other species that receive far less public attention.

The bison may be the most visible beneficiary, but it is rarely the only one.

🦬 Is the Bison Comeback a Conservation Success?

Saving bison from extinction is one of North America’s great conservation achievements. A species reduced from tens of millions to only a few hundred survived and increased dramatically.

Yellowstone now supports thousands of wild animals. Conservation herds exist across the continent. Tribal Nations are rebuilding buffalo herds. Modern science provides tools for managing genetics, disease, habitat, and population health that early conservationists did not possess.

Those are remarkable accomplishments.

At the same time, it would be misleading to suggest that the historic ecological presence of bison has been restored. Wild bison remain rare, occupy only a tiny portion of their former range, and often live in small or fenced herds where large-scale migration is impossible.

Restoration therefore has two stories at once. One is an extraordinary rescue from extinction. The other is unfinished work.

Close-up of a Buffalo (American Bison) (Bison Bison) in the Wichita Mountains NWR of SW Oklahoma | Richard G Smith

❓ National Bison Day FAQs

When is National Bison Day?

National Bison Day is observed on the first Saturday in November. In 2026, it falls on November 7.

Is a bison the same thing as a buffalo?

American bison are scientifically bison rather than true buffalo. However, “buffalo” has been used in North America for centuries and remains culturally important, particularly among many Indigenous communities.

How many bison once lived in North America?

Estimates vary, but the National Park Service says roughly 30 to 60 million bison may have lived across North America before their nineteenth-century decline.

How close did bison come to extinction?

By the late nineteenth century, fewer than 1,000 remained, with some estimates placing the surviving wild population at only a few hundred.

How many bison live in Yellowstone?

The National Park Service estimated nearly 5,300 bison in Yellowstone before the 2025 calving season.

Are bison endangered?

American bison as a species are not currently listed as federally endangered or threatened, but truly wild, free-ranging conservation populations remain uncommon.

How many wild or conservation bison are there?

National Park Service estimates place the number managed with conservation goals at roughly 30,000 to 31,000 in North America, compared with hundreds of thousands managed primarily as livestock.

Are bison dangerous?

Yes. Bison are wild animals capable of running quickly and causing serious injury. Visitors should maintain the distance required by the park or wildlife area they are visiting.

What do bison eat?

Bison primarily graze on grasses and sedges, although their diet can also include other vegetation depending on habitat and season.

What is a bison wallow?

A wallow is a depression created when bison roll and rub in soil. These disturbed patches can create distinctive microhabitats within grasslands.

Why are Tribal Nations restoring buffalo?

Reasons vary among Nations but can include cultural renewal, food sovereignty, spiritual traditions, ecological restoration, economic development, education, and rebuilding relationships with an animal of profound historical significance.

Is Yellowstone the only place with wild bison?

No, but Yellowstone is especially important because bison have persisted there continuously since prehistoric times and the park supports one of the continent’s most significant wild, migratory populations.

🦬 A Comeback Worth Celebrating—and Continuing

The American bison’s survival once seemed far from certain. An animal that had filled North American landscapes in numbers almost impossible to imagine was reduced to scattered survivors.

The losses were ecological, cultural, and deeply human for Indigenous Nations whose lives were intertwined with buffalo.

What followed was one of the continent’s great wildlife recoveries. Bison survived. Yellowstone’s tiny remnant became part of a herd numbering in the thousands. Other conservation herds were established. Tribal Nations are once again bringing buffalo home, and grasslands that had gone generations without bison are feeling their hooves again.

Yet National Bison Day is most meaningful when the story does not end with the word “saved.”

The challenge now is larger. It is about creating healthy herds with room to move, conserving genetic diversity, restoring the ecological processes that disappeared with the great herds, supporting Tribal Nations returning buffalo to their lands and communities, and finding ways for wild bison and modern human landscapes to coexist.

The bison’s first comeback was from the edge of extinction. The next comeback is about restoring what it means to be wild.