30-60 million Bison used to roam the plains

Super fact 110 : At the end of the 18th century there were 30-60 million North American Bison (buffalo) roaming the plains. The mass destruction of the bison began in 1830 and was intentional and by the end of the 19th century there were only a few hundred left. Since then, they have recovered and today there are 500,000 Bison including 30,000 wild Bison.

The picture shows a male plains bison standing on a plain and looking into the camera.
Scientists are helping users of American rangelands meet the challenge of managing multiple uses and sustainably. This picture is in the public domain because it contains materials that originally came from the Agricultural Research Service, the research agency of the United States Department of Agriculture. From Wikimedia commons author Jack Dykinga.

In the past there were at least 30-60 million bison, roaming North America. As mentioned by the end of the 19th century there were only a few hundred left. They have recovered since then and now there are 500,000 Bison including 30,000 wild Bison. For comparison there are 86.2 million cattle in the US  and another 11.8 million in Canada. This is just one of many reasons that the wild mammal biomass has substantially declined around the world. Wild mammals have declined by 85% since the rise of humans even as the total mammal biomass has nearly tripled.

The reason for the extremely sharp decline of the Bison in the 19th century was because the U.S. government intentionally drove the bison to the brink of extinction. The American bison was a major resource for the traditional way of life of the native Americans and therefore the extermination of the Bison became an important tool in the efforts to subjugate Native Americans.

30-60 million Bison used to roam the plains | 1892: bison skulls await industrial processing at Michigan Carbon Works in Rougeville (a suburb of Detroit). Bones were processed to be used for glue, fertilizer, dye/tint/ink, or were burned to create "bone char" which was an important component for sugar refining. In the 16th century, North America contained 25–30 million buffalo.
1892: bison skulls await industrial processing at Michigan Carbon Works in Rougeville (a suburb of Detroit). Bones were processed to be used for glue, fertilizer, dye/tint/ink, or were burned to create “bone char” which was an important component for sugar refining. In the 16th century, North America contained 25–30 million buffalo. This picture is in the public domain and taken from this Wikipedia.

I consider this a super fact because it is a shocking historical event that it seems many are unaware of. I was certainly surprised the first time I read about it.

How Did the Bison Population Recover ?

At the end of the 19th century indigenous groups used the Flathead Indian Reservation to quietly protect small captive herds, keeping bison alive while they vanished from the wild. In addition, a few individuals as well as Native American families captured stray calves and started private breeding programs.


A herd of grazing bison on a field in Yellowstone. In the background are geysers and hills.
Herd of American bison grazing in a green meadow at Yellowstone National Park, with geysers and mountains in the background under a bright blue sky. Shutterstock asset id: asset id: 2688666937 by NicoleHFlores



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