Yellowstone National Park Bison Population Pegged at 3,900
![](https://www.nationalparkstraveler.org/sites/default/files/styles/npt_square2/public/default_images/npt_icons_0.png?itok=8J64sZS9)
Whether it was an easy spring, fewer wolves preying on them, or simply a good year, the bison herds in Yellowstone National Park have grown by about one-third since winter, according to park officials.
- By Kurt Repanshek - August 19th, 2010 3:15am