Support WBURYellowstone Park Proposes Cull Of 1,000 Bison This WinterCamila DomonoskeNovember 19, 2015 ShareA bison herd with calves travels through Lamar Valley, Yellowstone National Park. The park has proposed a cull of 1,000 bison, primarily cows and calves, this winter. (National Park Service/Flickr)