On September 21, 2009, the Federal
District Court in Missoula issued an order
enjoining and vacating the delisting of the Greater Yellowstone Area grizzly
population. In compliance with this order, the Yellowstone grizzly population
is once again a threatened population under the Endangered Species Act (75
FR 14496, March 26, 2010).
The bison (Bison bison) is the largest land mammal in North
America. In a typical year, more than 3,000 bison roam the grasslands of
Yellowstone National Park. Bulls are more massive in appearance than cows, and
more bearded. For their size, bison are agile and quick, capable of speeds in
excess of 30 mph.
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