Yellowstone National Park's bison are majestic animals, standing around 6ft tall at the shoulder and weighing up to 2,000lb. It's understandable that visitors want to snap some photos of these colossal creatures, but sometimes awe gets in the way of common sense.
A group of about a dozen tourists have been caught on camera crowding around a particularly large bull grazing at the roadside. In a video shot by photographer Logan Smith and shared on infamous Instagram account TouronsOfYellowstone, several people can be seen sitting or standing with their backs to the animal, unable to see the changes in its body language that show its increasing agitation. The position of a bison's tail is a particular giveaway – if it's raised, you need to get out of there as soon as possible.
