Rhesus macaque  (Macaca mulatta)

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'.
Omnivore: An organism that feeds on both plants and animals.

1. IUCN Red List (March, 2005)
   http://www.redlist.org
   
2. Macdonald, D. (2001) The New Encyclopedia of Mammals. Oxford University Press, Oxford.
   
3. CITES (March, 2005)
   http://www.cites.org
   
4. Animal Diversity Web (March, 2005)
   http://animaldiversity.ummz.umich.edu/site/accounts/information/Macaca_mulatta.html
   
5. Primate Behaviour (March, 2005)
   http://members.tripod.com/uakari/macaca_mulatta.html
   
6. The Brain Museum (March, 2005)
   http://brainmuseum.org/Specimens/primates/rhesusmonkey/