Wild bison return to Illinois prairie after nearly 200 years
Bison reintroduction in Illinois marks a landmark moment in Midwestern conservation history. After nearly 200 years of absence, wild bison are once again roaming Nachusa Grasslands, a restored tallgrass prairie preserve in northern Illinois managed by The Nature Conservancy. The return matters because bison are a keystone species whose grazing, wallowing, and movement actively shape the prairie ecosystem in ways no human restoration tool can fully replicate. With the herd growing steadily since 2014 and calves being born on-site, Nachusa offers a compelling model for large-scale ecological recovery in a region where less than one-tenth of one percent of original prairie remains.









