Forest elephant  (Loxodonta cyclotis)

Infrasound: Sounds that are below the range of human hearing.
Subspecies: A different race of a species, which is geographically separated from other populations of that species.

1. IUCN Red List (January, 2006)
   http://www.redlist.org
   
2. Spinage, C. (1994) Elephants. T. & A. D. Poyser Ltd, London.
   
3. CITES (January, 2006)
   http://www.cites.org
   
4. Convention on Migratory Species (January, 2006)
   http://www.cms.int/
   
5. IUCN African Elephant Specialist Group (AfESG): Statement on the Taxonomy of extant Loxodonta (February, 2006)
   http://www.iucn.org/afesg/tools/pdfs/pos_genet_en.pdf
   
6. Burnie, D. (2001) Animal. Dorling Kindersley, London.
   
7. Macdonald, D. (2001) The New Encyclopedia of Mammals. Oxford University Press, Oxford.
   
8. Groning, K. and Saller, M. (1999) Elephants: a Cultural and Natural History. Koneman, Cologne.
   
9. Eltringham, S.K. (1997) The Illustrated Encyclopedia of Elephants. Salamander Books Ltd, London.
   
10. Blake, S. and Inkamba-Nkulu, C. (2004) Fruit, Minerals, and Forest Elephant Trails: Do All Roads Lead to Rome?. Biotropica, 36 (3): 392 - 401.
    
11. Cornell Lab of Ornithology – The Elephant Listening Project (February, 2006)
    http://www.birds.cornell.edu/brp/elephant/ELPFAQ.html
    
12. Blanc, J. (2006) Pers. Comm.
    
13. National Geographic News (September, 2002)
    http://news.nationalgeographic.com/news/2001/08/0824_twoelephants.html
    
14. IUCN African Elephant Specialist Group – Regional Strategy for the Conservation of Elephants in Central Africa (February, 2006)
    http://www.iucn.org/themes/ssc/sgs/afesg/tools/pdfs/str_afc0512_fr.pdf