Yellowstone may not be home to nomadic elephant herds or bushy-maned lions yet the wildlife at this U.S. National Park is no less exciting. Watch bison bulls shake the earth as they collide in battle. Observe gray wolves stalk their prey by wit and cunning. View grizzlies feasting on the labors of another species. Yellowstone is inhabited by all the same large mammals as at the end of the Pleistocene era. Black bear, coyote, red fox, mountain lion, moose, elk, pronghorn, mule deer, bighorn sheep, bald eagles, peregrine falcons, river otter and trumpeter swans are just a few of the animals and birds spotted here. But before you pack your bags for a wildlife safari in Yellowstone National Park put aside any notions of private game viewings in open-air vehicles. Picture instead roadside sightings with friendly aficionados willing to share their scope as well as their experience. Yellowstone is the Serengeti of North America in all ways but one.