This page deals with Yellowstone wildlife.
Wildlife are creatures of habit.
They usually follow the same trails and go to the same areas at particular times of the day and year. They have favorite feeding grounds and food. They will normally go to the same spring, summer, fall and winter feeding grounds. This is not a guaranteed item, and habits will change due to natural conditions, drought, fire, etc. When you arrive at Yellowstone, check with the rangers on recent bear and wolf sightings or radio locations of the packs.