Gelada  (Theropithecus gelada)

Evert: To turn inside out or outwards.
Oestrus: The time of ovulation (release of an egg from the ovary) in female mammals, when the female becomes receptive to males, also known as ‘heat'.
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 (June, 2009)
   http://www.iucnredlist.org
   
2. Richardson, M. (2006) Pers. Comm.
   
3. CITES (May, 2006)
   http://www.cites.org
   
4. Morell, V. (2002) In a male-dominated world, a female-run society is decidedly refreshing. Check out gelada monkeys—but don't mess with the queens: They bite. National Geographic Magazine, 0: 0.
   
5. Macdonald, D. (2001) The New Encyclopedia of Mammals. Oxford University Press, Oxford.
   
6. The Primata (May, 2006)
   http://www.theprimata.com/theropithecus_gelada.html
   
7. Animal Diversity Web (May, 2006)
   http://animaldiversity.ummz.umich.edu/site/index.html
   
8. Burnie, D. (2001) Animal: The Definitive Visual Guide to the World's Wildlife. Dorling Kindersley, London.