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Steppe bison

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The steppe bison, known scientifically as *Bison priscus*, was a massive extinct species of bison.

Steppe Bison
Steppe Bison

These animals lived from the Middle Pleistocene through the Holocene epoch. They were a vital part of the mammoth steppe, a highly productive biome. This environment stretched from Spain to Canada and from China to the Arctic islands. The mammoth steppe supported many different plants, herbivores, and predators. The steppe bison played a major role in this vast ecosystem.

Central Europe last glacial landscape
Central Europe last glacial landscape

Scientists study the steppe bison through its complex evolutionary history. The species first appeared in eastern Eurasia during the mid-Middle Pleistocene. It eventually moved westward into Western Europe. Around 195,000 to 135,000 years ago, they entered northwest North America via Beringia. This area included modern-day Alaska and the Yukon. Later, they moved into central North America around 130,000 years ago. This movement happened after the Laurentide Ice Sheet began to melt. One population eventually evolved into the long-horned bison, *Bison latifrons*. This lineage later led to *Bison antiquus*, the ancestor of modern American bison.

Prazubr rysunek 600
Prazubr rysunek 600

Researchers divide the steppe bison into several different subspecies. These subspecies are organized by time and region. *Bison priscus gigas* lived during the early Middle Pleistocene in Siberia and Eastern Europe. *Bison priscus priscus* lived during the late Middle Pleistocene from Western Europe to Siberia. The Late Pleistocene subspecies is known as *Bison priscus mediator*. Some scientists also suggest a North American subspecies called *Bison priscus alaskensis*. This subspecies ranged from Alaska down to Texas. However, its official taxonomic status is still a subject of debate among experts.

We know much about their appearance from fossilized remains. Adult bulls were very tall and heavy. Like modern bison, they had a hump above their front legs. Their skulls are unique because of their horn cores, which are the bony parts of the horns. These cores projected sideways and curved upward. The size of these cores changed between subspecies. *Bison priscus gigas* had very wide horn cores. These grew smaller in later subspecies like *B. p. mediator*. Even so, their horns were generally larger than those of living bison.

Skamieniały szkielet w muzeum przyrodniczym w Tiumeniu 3
Skamieniały szkielet w muzeum przyrodniczym w Tiumeniu 3

Dietary studies reveal how these animals survived in their environment. Analysis of dental microwear suggests they were mixed feeders. This means they ate both grasses and browse, which are woody plants. For example, DNA from a frozen mummy in the Kolyma Lowland showed they ate forbs and graminoids. They also ate plants like larch, willow, birch, and alder. Some populations in Ukraine ate about 37% C4 plants. Their diet was varied and changed based on their local area.

Steppe Bison
Steppe Bison

Steppe bison shared their world with many dangerous predators. Cave hyenas were likely predators, as their dens often contain bison remains. Cave lions also hunted them. We know this because bite marks were found on a famous specimen named "Blue Babe." This male bison was found in Alaska in 1979. It was a mummified carcass covered in a blue mineral called vivianite.

Steppe Bison
Steppe Bison

Humans also interacted with them. Neanderthals hunted them in Europe during the Middle Paleolithic. Modern humans also hunted them for food. Early humans even created beautiful cave art depicting them.

Lascaux 001
Lascaux 001

You can see these drawings in the Lascaux and Chauvet caves in France.

Ultimately, the steppe bison went extinct during the Late Quaternary extinction event. Their numbers shrank at the end of the Pleistocene. They disappeared from Western Europe around 12,000 to 10,000 years ago. They survived longer in Siberia and parts of North America. A bison skeleton in the Yukon was dated to about 3,450 BCE. Another find in Siberia was dated to around 4,500 years ago. However, some scientists doubt fossil records older than 8,700 years in Eurasia. Most experts believe climate change and human hunting caused their decline. A 2022 study suggests they might have survived in small northern refugia if humans had not hunted them.

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🖼️ Images & Media (6)
File:Skamieniały szkielet w muzeum przyrodniczym w Tiumeniu 3.jpg
Skamieniały szkielet w muzeum...
File:Prazubr rysunek 600.jpg
Prazubr rysunek 600.jpg
File:Central_Europe_last_glacial_landscape.jpg
Central_Europe_last_glacial_landscape.jpg
File:Lascaux 001.jpg
Lascaux 001.jpg
File:F07 0054.Ma.JPG
F07 0054.Ma.JPG
File:Steppe Bison.jpg
Steppe Bison.jpg
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