Bison facts for kids
Quick facts for kids Bison |
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| American bison (Bison bison) |
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| European bison (Bison bonasus) |
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Scientific classification  |
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Artiodactyla |
| Family: | Bovidae |
| Subfamily: | Bovinae |
| Subtribe: | Bovina |
| Genus: | Bison Hamilton Smith, 1827 |
| Type species | |
| Bison bison Linnaeus, 1758
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| Species | |
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A bison is a very large animal related to cattle. It belongs to the group of animals called bovines. The word Bison comes from Greek and means 'wild ox'.
There are two types of bison alive today: the American bison and the European bison. Many other bison species lived long ago but are now extinct.
The American bison lives only in North America. People sometimes call it a "buffalo," but it's different from the true buffalo found in Asia and Africa. The American bison has two main kinds: the Plains bison and the wood bison. The European bison, also called a wisent, lives in Europe and the Caucasus mountains. It was once extinct in the wild but has been brought back.
Scientists used to think bison were in their own special group. Now, genetic studies show they are closely related to other animals like yaks and even domestic cattle.
Contents
What is a Bison?
Bison are some of the biggest land animals in North America and Europe. They are known for their broad, muscular bodies and shaggy, long hair. They have hooves, like deer and cows.
Adult American bison can grow up to 2 meters (6.6 feet) tall and 3.5 meters (11.5 feet) long. They can weigh between 400 and 1,270 kilograms (880 to 2,800 pounds). European bison are a bit taller but usually weigh less, from 800 to 1,000 kilograms (1,760 to 2,200 pounds).
Bison are always on the move, eating grass and other plants. They live in herds. Young male bison leave the female herds when they are two or three years old. They then join smaller groups of other males. During the late summer, when it's time to reproduce, males and females come together.
American bison once lived across a huge area, including much of the United States and parts of Mexico. Both American and European bison were hunted a lot in the past. Their numbers became very low. Luckily, people worked hard to protect them, and their populations have grown back. For example, the Chernobyl Exclusion Zone in Europe has become a safe place for wisent to live.
Even though they look similar, American and European bison have some differences. American bison have 15 ribs, while European bison have 14. American bison are usually stockier and have shorter legs. American bison mostly eat grass, while European bison also eat more leaves and shrubs. Their bodies show these differences; the American bison's head hangs lower, which helps it graze. American bison are also hairier, but their tails have less hair than European bison. The horns of European bison point differently, which helps them fight by locking horns. American bison tend to butt heads.
Bison History and Relatives
Bison are part of a large family of animals called bovines. This group includes cattle, yaks, and gaur. Scientists believe bison evolved from ancient relatives in Asia millions of years ago.
The ancestors of today's bison spread across Asia and then into North America. This happened when a land bridge connected Asia and North America. Over time, different types of bison evolved in North America. These included very large ones like Bison latifrons and smaller ones like Bison antiquus. Modern American bison are thought to have come from B. antiquus. The European bison appeared in Europe later.
In the 1800s, the number of American bison was huge, possibly up to 60 million. But then, a period of intense hunting caused their population to drop dramatically. At one point, there were only about 541 bison left in North America. Some ranchers tried to save the species by breeding bison with cattle. This created animals called "beefalo." However, this practice was mostly stopped because the mixed animals didn't have special advantages.
Today, many ranchers use DNA tests to make sure their bison herds are pure. There are also important purebred American bison herds in national parks. These include Yellowstone National Park and Elk Island National Park. These pure herds are vital for the future of the species.
Bison Behavior
One common behavior of bison is wallowing. This is when they roll around in shallow dips in the soil, either wet or dry. They cover themselves in mud or dust. Scientists think they do this for several reasons:
- To help shed their winter coats.
- As a way for males to interact during mating season.
- To help the herd stay together.
- For fun or play.
- To get relief from biting insects.
- To remove ticks and lice.
- To cool down or warm up.
Bison can be unpredictable. They might look calm, but they can attack without warning. They can run very fast, up to 56 kilometers per hour (35 miles per hour).
Their main defenses are their horns, which both males and females have. They can also use their massive heads to ram things. Their strong hind legs can deliver powerful kicks. Early naturalists described them as powerful animals that feared little.
The mating season, called the rut, happens from June to September. During this time, older male bison rejoin the female herds. Males often fight each other. The animals become more restless and can be more dangerous during this season.
Bison Habitat
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American bison live in river valleys, prairies, and plains. They prefer open grasslands or areas with some trees and shrubs. They can also be found in hilly or mountainous regions. For example, bison in Yellowstone Park bison herd often live at high elevations. The Henry Mountains bison herd in Utah lives on plains and in mountain valleys up to 3,000 meters (10,000 feet) high.
European bison usually live in areas with light to dense woods, as well as places with many shrubs. They can also sometimes be found in grasslands.
Managing Bison Herds
In many places, landowners want to control where wild bison roam. Herds on private land must be kept inside fences. In some areas, there are rules about bison on public land, especially if they might spread diseases to cattle or damage property. These rules sometimes lead to disagreements between different groups of people.
Bison Diet
Bison are ruminants. This means they have a special stomach that helps them digest tough plant material like grass. While they were once thought to eat only grasses, we now know they eat many different plants. This includes woody plants and other leafy plants.
Throughout the year, bison choose plants that have the most protein or energy. They often eat the same types of plants year after year. Plants usually have the most protein in the spring. In places like Yellowstone National Park, bison eat willows and cottonwoods, especially in winter when other foods are scarce. Bison often move to new areas to find the best food. They like to feed in recently burned areas because new, high-quality plants grow there. European bison tend to eat more shrubs and low-hanging trees than American bison, which prefer grass.
Bison Reproduction and Life Cycle
Female bison, called "cows," usually start having calves after they are three years old. They can continue to have calves until they are over 19. Cows typically have one calf each year, as long as they get enough food. The weight of a calf depends on the mother's weight and age. Heavier cows tend to have heavier calves. Older cows, especially after age eight, may have lighter calves.
Bison Predators
Because of their large size, bison have few natural predators. The main ones are humans, grey wolves, cougars, grizzly bears, and coyotes. Wolves usually hunt bison in packs. Grizzly bears sometimes take over a kill made by wolves. Both grizzly bears and coyotes also hunt bison calves. Long ago, other predators like ancient lions and tigers also hunted bison.
Bison Health Challenges
American bison can face illnesses like malignant catarrhal fever. Brucellosis is another serious concern for the Yellowstone Park bison herd. Bison in the Antelope Island bison herd receive regular vaccinations to protect them from various diseases and parasites.
European bison also face health challenges, including foot-and-mouth disease and other specific illnesses. Because their population was once very small, inbreeding can lead to genetic problems and weaker immune systems. This makes them more vulnerable to diseases.
The Name "Bison"
The name 'bison' comes from ancient Greek and Roman writers. They used the Greek word bisōn and the Latin word bĭson to describe the European species. The German name 'wisent' has a similar origin.
In American English, people often call American bison "buffalo." However, bison are only distantly related to the "true buffalo" found in Asia (water buffalo) and Africa (African buffalo). The French explorer Samuel de Champlain used the term buffle for bison in 1616. Even though "bison" is more scientifically accurate, "buffalo" is also considered correct in American English because it has been used for so long.
Bison and Human Culture
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Bison were incredibly important to the Indigenous peoples of North America. For the Plains Indians, bison were their main source of food and materials. They valued their connection with bison and saw them as sacred. They treated bison with respect, hoping to ensure their continued presence.
Lakota elder John Fire Lame Deer explained this special relationship:
The buffalo gave us everything we needed. Without it we were nothing. Our tipis were made of his skin. His hide was our bed, our blanket, our winter coat. It was our drum, throbbing through the night, alive, holy. Out of his skin we made our water bags. His flesh strengthened us, became flesh of our flesh. Not the smallest part of it was wasted. His stomach, a red-hot stone dropped into it, became our soup kettle. His horns were our spoons, the bones our knives, our women's awls and needles. Out of his sinews we made our bowstrings and thread. His ribs were fashioned into sleds for our children, his hoofs became rattles. His mighty skull, with the pipe leaning against it, was our sacred altar. The name of the greatest of all Sioux was Tatanka Iyotake—Sitting Bull. When you killed off the buffalo you also killed the Indian—the real, natural, "wild" Indian.
In the 1800s, European settlers caused a huge decline in the American bison population. Millions of bison were hunted. This overhunting was partly to clear land and to limit the resources of Indigenous peoples. The bison population dropped to only a few hundred animals.
Efforts to save the American bison began in the early 1900s. Thanks to protection and careful breeding, their numbers have grown significantly. Today, there are nearly 150,000 bison. However, many of these bison have some cattle genes from past breeding. Only a few herds, like those in Yellowstone National Park and Elk Island National Park, are considered genetically pure. These pure herds are very important for keeping the species healthy.
In Yellowstone National Park, visitors must stay a safe distance from bison. In 2015, several visitors were injured because they got too close to the animals. It's important to remember that bison are wild animals and can be dangerous.
Bison as Livestock
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Today, bison are increasingly raised for their meat, hides, and wool. Most bison in the world are raised for human use. Bison meat tastes similar to beef but is lower in fat and cholesterol, and higher in protein. There is even a market for kosher bison meat.
The commercial industry for bison meat has grown over time. In the 1990s, it was hard to sell all parts of the bison. But now, restaurants and stores have helped make bison meat more popular.
In Canada, commercial bison farming started in the mid-1980s. By 2006, there were nearly 200,000 bison on almost 1,900 farms.
Some pet food companies also use bison meat as an ingredient in dog foods.
See also
In Spanish: Bisontes para niños
- Bison hunting
- Gaur
- National Bison Day (1 November in the United States)
- Yellowstone Park bison herd
