Pygmy hippopotamus  (Choeropsis liberiensis)

Gestation: The state of being pregnant; the period from conception to birth.
Subspecies: A different race of a species, which is geographically separated from other populations of that species.
Territory: Area occupied and defended by an animal, a pair of animals or a colony.
Ungulate: Hoofed, grazing mammal.

1. IUCN Red List (May, 2009)
   http://www.iucnredlist.org
   
2. Macdonald, D. (2001) The New Encyclopedia of Mammals. Oxford University Press, Oxford.
   
3. CITES (May, 2009)
   http://www.cites.org
   
4. Smithsonian Museum (April, 2002)
   http://nationalzoo.si.edu/animals/asianelephants/factpygmyhippo.cfm
   
5. Ultimate Ungulate (April, 2002)
   http://www.ultimateungulate.com/Artiodactyla/Hexaprotodon_liberiensis.html
   
6. African Mammals Database (April, 2002)
   http://www.gisbau.uniroma1.it/amd/amd142b.html
   
7. Lewison, R. (April, 2002) Pers. Comm.