Yellowstone NP, Wyoming 2012 - waynelr
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Yellowstone Bison

Don't try to stare down a buffalo.

The Yellowstone Park bison herd in Yellowstone National Park is probably the oldest and largest public bison herd in the United States. Yellowstone is known for its geothermal activity and large mammals, especially elk, wolves, American bison, bears, pronghorns, moose and bighorn sheep. The Yellowstone Park bison herd was estimated in 2011 at approximately 3,700 individuals in two major sub-herds. The bison in the Yellowstone Park bison herd are American bison of the Plains bison subspecies. Yellowstone National Park may be the only location in the United States where free-ranging bison were never extirpated, since they continued to exist in the wild and were not re-introduced, as has been done in most other bison herd areas. Other large free-ranging, publicly controlled herds of bison in the United States include the Wind Cave bison herd (approximately 350 animals), the Antelope Island bison herd (approximately 550 to 700 animals), the Henry Mountains bison herd in Utah (400 to 500 animals), and the National Bison Range herd near Flathead Lake, Montana (400 animals).