Yellowstone offers amazing wildlife viewing opportunities any time of day or year. Animals tend to feed during early morning and evening and may be more visible at these times because they're up and moving around. Bears begin emerging from hibernation in March and April and can often be seen grazing in roadside meadows until the heat of summer pushes them to higher elevations (and away from roads). Winter is a great time to watch wolves because they're out of their dens (pups usually emerge in May) and easier to see on a snowy landscape. Read more about seasonal highlights in Yellowstone.