Mule Deer – Odocoileus hemionus

Odocoileus hemionusRafinesque, 1817

Accepted name,

Revised by Cowan (1936); reviewed by Anderson and Wallmo (1984, Mammalian Species, 219) and Geist (1998). The species can be partitioned into the columbianus division or Black-tailed Deer (including also sitkensis) and the nominate hemionus division or Mule Deer sensu stricto (including also californicus, cerrosensis, eremicus, fuliginatus, inyoensis, peninsulae, and sheldoni). Dorcelaphus crooki Mearns, 1897 is based on a hybrid between O. virginianus and O. hemionus (Heffelfinger, 2000).