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
Uploaded Dec 30, 2016. Captured Sep 19, 2015 16:59 in E Entrance Rd, Yellowstone National Park, WY 82190, USA.