Sanford's brown lemur  (Eulemur sanfordi)

Arboreal: Living in trees.
Cathemeral: Active intermittently throughout the day and night.
Quadrupedal: Applied to animals that walk on four feet.

1. IUCN Red List of Threatened Species (June, 2009)
   http://www.redlist.org
   
2. Garbutt, N. (1999) Mammals of Madagascar. Pica Press, Sussex.
   
3. Richardson, M. (2005) Pers. Comm.
   
4. CITES (November, 2005)
   http://www.cites.org
   
5. Animal Diversity Web (November, 2005)
   http://animaldiversity.ummz.umich.edu/site/index.html
   
6. bbc.co.uk Science and Nature (November, 2005)
   http://www.bbc.co.uk/nature/wildfacts/factfiles/339.shtml