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Yellowstone National ParkAerial photo of wolf pack in snow.
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Yellowstone National Park
B is for Bison
A mother bison keeps close to her young calve while walking across a road.

 

Bison are the biggest animals in Yellowstone. Even the biggest bison had to start as a little baby calf.

 
Upper Geyser Basin Hydrothermal Features on a Winter Day.  

Did You Know?
Yellowstone contains approximately one-half of the world’s hydrothermal features. There are over 10,000 hydrothermal features, including over 300 geysers, in the park.

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Last Updated: July 18, 2007 at 10:43 EST