Watch out for bison jams at Yellowstone National Park. As nice as wildlife like bison look, they’re wild and unpredictable. Remember to never approach wildlife. The safest – and often best – view of wildlife is from inside a car. Always stay at least 100 yards away from bears and wolves, and at least 25 yards away from all other animals, including bison and elk. Be sure to stay in your vehicle if you encounter a wildlife jam, and do not feed wildlife. Animals that become dependent on human food may become aggressive toward people and have to be killed. Take the #YellowstonePledge to protect the landscape, wildlife and yourself at our nation’s first park. Photo by National Park Service.