Yellowstone Migration

Yellowstone and specifically the Lamar Valley has often been called America's Serengeti because of  its population of bison, elk, deer (whitetail & mule), bighorn sheep, pronghorn, and moose, as well as predators such as grizzlies, wolves, cougar, coyotes, bobcat, Canada lynx, and black bears.  When thinking of Tanzania's Serengeti it brings to mind great wildlife migrations of wildebeest, zebra, and gazelle crossing territories of lions, cheetah, spotted hyena, and leopards, and fording rivers attempting to escape the snapping jaws of the Nile crocodile.   The Greater Yellowstone Ecosystem also experiences seasonal migrations.  During the winter season many of the prey species migration to lower valley locations where winter is less harsh, and the snow is not as deep.  Some migrate over 100 miles. 

When migrating North out of Yellowstone park, bison are bottlenecked at Yankee Jim Canyon.  When they step over the park boundary they are allowed to be hunted.