The most common animals you will see in the national parks are elk and moose. Also see bighorn sheep and pronghorn antelope in the surrounding landscapes.
How wolves in Yellowstone have impacted their environment is an evolving story. What's happened regarding ungulate populations, hunter harvest, domestic livestock, and land use.
Visit Yellowstone National Park in autumn to experience the unforgettable call of the bull elk in the mating season.
About 800 moose inhabit the southern part of Yellowstone, Grand Teton National Park and surrounding national forests.
Loss of Aspens in Yellowstone National Park traced to Elk grazing before wolf reintroduction. Now wolves help control Elk population.
Before the reintroduction of wolves, elk predators included coyotes, black bears, grizzly bears, mountain lions and man.