A summer evening in Yellowstone National Park turned into a frightening wildlife encounter when a bull bison unexpectedly charged a grandfather walking with his teenage grandson near Bridge Bay Campground. Witnesses said the pair appeared to be following park safety guidance and did not provoke the animal.
The incident, captured on video, has renewed discussion about the unpredictable behavior of wild bison and the importance of respecting their space.
A peaceful walk turned dangerous
Carl Isom-McDaniel and his 13-year-old grandson were walking through the campground after dinner when they noticed a large bull bison nearby. According to eyewitness Mike MacLeod, the animal had already shown unusually aggressive behavior by charging another nearby group earlier that evening.
As the pair attempted to move away, the bison suddenly focused on them and began charging.
A grandfather’s instinct to protect
With only seconds to react, McDaniel told his grandson to run in one direction while he moved in another, hoping to draw the bison away. The strategy worked, as the animal pursued McDaniel instead of the teenager.
The bison caught him and tossed him several feet into the air, causing severe injuries that later required surgery.
Witnesses rushed to help
After seeing McDaniel thrown into the air, MacLeod stopped filming and joined other bystanders in shouting and clapping to drive the bison away. Their actions created enough space for people to reach the injured man and provide assistance until emergency responders arrived.
MacLeod later recalled that McDaniel’s first question after the attack was whether his grandson was safe.
Why bison can become aggressive
Bull bison can become especially unpredictable during the summer breeding season, known as the rut. Even when people maintain recommended viewing distances, wild animals may react suddenly to nearby activity, other animals, or environmental disturbances.
Because their behavior can change in seconds, park officials stress that no wild bison should ever be approached.
Staying safe around Yellowstone wildlife
The National Park Service advises visitors to remain at least 25 yards (23 meters) away from bison at all times. If an animal changes direction, raises its tail, paws the ground, or begins moving toward people, visitors should calmly create more distance immediately.
Respecting wildlife space remains the best way to prevent dangerous encounters.
Recovery and an important reminder
McDaniel is recovering after surgery and expressed gratitude that his grandson escaped without injury. The incident serves as a reminder that even experienced visitors can encounter unpredictable wildlife behavior.
Yellowstone’s animals are wild, powerful, and deserving of both admiration and caution.
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