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. There are believed to be several subspecies, including the black-tailed deer. However, some genetic studies have indicated that mule deer may have developed relatively recently through the interbreedi... Found on http://en.wikipedia.org/wiki/Mule_deer
(species Odocoileus hemionus), large-eared deer, family Cervidae (order Artiodactyla), found in western North America from Alaska to Mexico. A ... [1 related articles] Found on http://www.britannica.com/eb/a-z/m/135