Remember that animals you see in the park may encounter many people every day. Even celebrities get tired of photographers chasing them; for wildlife, repeated harassment weakens and kills.
Animals you see in the park are often feeding. When people get too close, animals sense danger and waste energy moving away. Repeated disturbance means animals do not get enough to eat.
One purpose of National Parks is to preserve wild places and all that lives there. With about three million people coming to Rocky each year, park wildlife is under stress. Each of us can help by learning how to watch animals without disturbing them.