Asian wild ass  (Equus hemionus)

Pleistocene: A geological time period from approximately 2 million years ago until 10,000 years ago.
Steppe: A biome (or subdivision of the Earth's surface) that is composed of a swathe of temperate grassland stretching from Romania to China.
Subspecies: A population usually restricted to a geographical area that differs from other populations of the same species, but not to the extent of being classified as a separate species.

1. IUCN Red List of Threatened Species 2003 (March, 2004)
   http://www.redlist.org
   
2. Animal Diversity Web (March, 2004)
   http://animaldiversity.ummz.umich.edu/site/accounts/information/Equus_hemionus.html
   
3. Asiatic wild ass- IUCN/ AAC Equid Specialist Group (March, 2004)
   http://www.iucn.org/themes/ssc/sgs/equid/ASWAss.html
   
4. Goyal, S.P., Reading, R., Rowen, M., Shah, N. and Feh, C. (2002) Status and Action Plan for the Asiatic Wild Ass (Equus hemionus). In: Moehlman, P.D. Ed. Equids: Zebras, Asses, and Horses: Status Survey and Conservation Action Plan. IUCN/SCC Equid Specialist Group, IUCN (The World Conservation Union), Gland Switzerland and Cambridge. Available at:
   http://www.iucn.org/themes/ssc/sgs/equid/docs/part2chapter5.pdf