Geoffroy's marmoset  (Callithrix geoffroyi)

Arboreal: Living in trees.
Diurnal: Active during the day.
Gregarious: Tending to form a group with others of the same species by habitually living or moving in flocks or herds rather than alone.
Monogamous: Mating with a single partner.
Pheromone: A chemical produced by an animal, which stimulates a behavioural or physiological response in another member of the same species.

1. IUCN Red List (January, 2006)
   http://www.iucnredlist.org
   
2. BBC: Science and Nature (January, 2006)
   http://www.bbc.co.uk/nature/wildfacts/factfiles/305.shtml
   
3. CITES (January, 2007)
   http://www.cites.org
   
4. Macdonald, D. (2001) The New Encyclopedia of Mammals. Oxford University Press, Oxford.
   
5. Bristol Zoo Gardens (January, 2006)
   http://www.bristolzoo.org.uk/learning/animals/mammals/marmoset
   
6. Wakenshaw, V. (1999) The Management and Husbandry of Geoffroy's Marmoset. International Zoo News, 46 (1): 0. Available at:
   http://www.zoonews.ws/IZN/290/IZN-290.html
   
7. Tampa's Lowry Park Zoo (January, 2006)
   http://www.lowryparkzoo.com/html/l3/fact_sheets/l3_att_hab_fspri_geoffmarmoset.html
   
8. Primate Behaviour (January, 2006)
   http://members.tripod.com/uakari/callithrix_geoffroyi.html