When you visit Yellowstone National Park, you might wonder about the large, shaggy animals you see roaming the landscape. Many people mistakenly call these creatures buffalo, but they are actually bison.
The main difference is that bison are native to North America, while buffalo refers to species found in other parts of the world, such as the Asian water buffalo and African buffalo.
Bison, specifically the American bison, are a symbol of the American West and play a crucial role in the ecosystem of Yellowstone. They were once on the brink of extinction, but thanks to conservation efforts, you can now find about 4,600 free-roaming bison in the park. European bison, on the other hand, are not found in Yellowstone and have their own habitats in Europe.
Understanding the difference between bison and buffalo can enhance your experience while exploring the park. Knowing what you see adds depth to your visit and connects you to the rich wildlife and history of North America. Whether you’re viewing a herd of wild bison or learning more about their impact on the environment, this knowledge makes your adventure in Yellowstone even more enjoyable.
Bison and Buffalo Taxonomy and Species

Understanding the taxonomy and species of bison and buffalo helps distinguish these two animals. While they share some similarities, they belong to different groups within the Bovidae family, each with unique characteristics and habitats.
Bison in North America and Europe
There are two main species of bison: the American bison (Bison bison) and the European bison (Bison bonasus).
- American bison are commonly found in North America, especially in Yellowstone National Park. They can weigh up to 2,200 pounds and are known for their large shoulder hump.
- The wood bison, a type of American bison, is found in Canada and is the largest subspecies.
The European bison, or wisent, is primarily found in the Białowieża Primeval Forest of Eastern Europe. Once near extinction, efforts have helped this species recover.
Bison are social animals, often living in herds. Conservation efforts focus on protecting their habitats and increasing population numbers.
Buffaloes in Asia and Africa
Buffaloes are distinct from bison and are mainly categorized into two groups: the water buffalo (Bubalus arnee) and the African buffalo (Syncerus caffer).
- The water buffalo is native to Asia and is essential for agriculture in countries like India and Vietnam. They can be found in wet, marshy areas and are often domesticated.
- The African buffalo roams in sub-Saharan Africa and is known for its social behavior, forming large herds.
Both species are facing threats from habitat loss and hunting. The conservation of buffaloes is crucial, as many populations are near threatened or vulnerable. Protecting their environments supports their survival.
Physical and Behavioral Differences

Bison and buffalo are often confused, but they have distinct physical and behavioral traits. These differences help you locate and appreciate them in places like Yellowstone National Park.
Anatomy and Appearance
American bison are known for their massive size and unique features. They can weigh up to 2,200 pounds and reach a length of about 12 feet from head to tail.
A key trait is their distinctive hump on the back, which is formed by strong muscles above their shoulders. Their fur is thick and shaggy, usually dark brown, which helps them stay warm in cold climates.
Buffalo, such as the African and Asian varieties, differ significantly. They lack the hump and have long, curved horns. African buffalo have larger, more dangerous horns that can spread wide. The color of their fur can vary, and they generally have a sleeker appearance compared to bison.
Habitat and Social Structures
Bison prefer grasslands and open plains, making places like Lamar Valley in Yellowstone an ideal home. They often roam in herds, which can number in the hundreds. This social behavior helps protect them from predators.
Buffalo, on the other hand, can be found in a variety of habitats like swamps or forests, depending on the species. They often move in smaller groups, known as bachelor herds, especially when the females are with their young.
Both animals play vital roles in their ecosystems. Witnessing these majestic creatures in their natural environments can be rewarding.