The mule deer (Odocoileus hemionus) is a deer indigenous to western North America; it is named for its ears, which are large like those of the mule. Two subspecies of mule deer are grouped into the black-tailed deer.
Similar species: Even-toed Ungulates
By travismorhardt
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Uploaded Nov 12, 2013. Captured May 26, 2012 08:22 in U.S. 20, Yellowstone National Park, WY 82190, USA.