Mule deer
Unlike the related white-tailed deer ("Odocoileus virginianus"), which is found through most of North America east of the Rocky Mountains and in the valleys of the Rocky Mountains from Idaho and Wyoming northward, mule deer are only found on the western Great Plains, the Rocky Mountains, the southwest United States, and on the west coast of North America. Mule deer have also been introduced to Argentina and Kauai, Hawaii.