Yellowstone Winter Survival: Bison Matriarch Rams RV to Protect Calves Lamar Valley, Wyoming – January 15, 2026 A terrifying encounter at a snow-covered Yellowstone campsite was captured by a stationary trail camera, showing the raw power of a 2,000-pound American Bison. The footage begins with a camper loading gear into the rear of his RV, unaware that a mother bison and her two young calves were grazing just behind his vehicle. Sensing a threat to her offspring, the matriarch launched a full-s