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Bison crossing

Bison are large herd animals that defend their young vigorously. American bison can run up to 35 miles per hour and are surprising agile, in addition to their notable strength and irritable temperament. Significant apex predators that are found in Yellowstone National Park including American black bears, Grizzly bears and wolves. Other large mammals found in Yellowstone include elk, moose, coyotes, bobcats, deer, pronghorn, and bighorn sheep. Wolves and bears are clearly successful predators of bison, but bison meat is not a major component of their diet. Competitive pressure from the other large grazing mammals in Yellowstone Park may also help limit the number of bison in the herd, but this is not considered to have had a significant effect on bison numbers. Disease, including various viruses, parasites and brucellosis, have a greater effect on bison population. However, a common cause of death for these bison continues to be hunting by human beings. This occurs when many of the bison leave the park during the winter, heading up into Montana, especially through the Lamar Valley. At such times, the State of Montana has authorized large buffalo hunts to eliminate the animals, because of concerns about spreading brucellosis to local domestic cattle. Source: en.wikipedia.org/wiki/Yellowstone_Park_bison_herd

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Uploaded on June 11, 2015
Taken on June 6, 2015