Given that spotting bison is common, there are rules visitors need to follow. Bison at Yellowstone can weigh up to 2,000 pounds, posing safety risks if approached inappropriately.

Bison herd stops traffic as it crosses road in Yellowstone A bison died after it appeared to stumble into a hot spring at Yellowstone National Park last week while visitors looked on.

A bison in Yellowstone National Park appeared to stumble into the scalding water of Grand Prismatic Spring, causing its death as tourists looked on during the park’s busiest season.

Photos show the bison struggling in the spring, thrashing and jumping into the air to try to get away from the boiling hot water.

Several people witnessed a bison’s final moments after it fell into a hot spring in Yellowstone National Park, photos and videos show. Screenshot of Katie Hirtzel's video in "Yellowstone Through ...