Size of the herd still up for debate
There are those who contend Yellowstone’s northern bison herd, numbering 4,000 and approximately 10 times larger than historical size, is leaving a damaging impact on the land. There are those who would argue the shifting landscape is more a part of the natural process that includes a very large herd of ungulates, like the bison and elk. One thing that all agree on is that Yellowstone National Park, and its surrounding ecosystems, are a treasure to be preserved for future generations to enjoy. How to best accomplish that is still up for debate.