The bison herd at Yellowstone is unique for a number of reasons. They were the only herd in the lower 48 states to remain in-tact despite incredible over-hunting elsewhere. Their numbers dwindled to only 23 individuals at the turn of the 20th century.

With the care of conservation biologists at Yellowstone, their numbers have grown to over 3,000 animals. Now the focus has shifted from protection to proliferation, speading out the herd into different locations so that one natural disaster doesn’t mean extinction for the bison.

Learn more about bison conservation efforts and what it means to local Native American tribes in the video.

Want to do something to help bison? Sign our petition telling Governor Steve Bullock to stop the slaughter and let bison roam outside of Yellowstone National Park!