White-crowned hornbill  (Aceros comatus)

Larvae: Stage in an animal's lifecycle after it hatches from the egg. Larvae are typically very different in appearance to adults; they are able to feed and move around but usually are unable to reproduce.
Monogamous: Having only one mate during a breeding season, or throughout the breeding life of a pair.
Sexual selection: The theory proposed by Darwin that some animals possess characteristics that are more attractive to potential mates. Individuals with such characteristics mate more than those without, so that more of the next generation will inherit the desirable trait. Such characters would be used either in male displays to attract females, or in combat between rival males.

1. IUCN Red List (January, 2007)
   http://www.iucnredlist.org
   
2. Kemp, A.C. (1995) The Hornbills. Oxford University Press, Oxford.
   
3. CITES (January, 2007)
   http://www.cites.org
   
4. del Hoyo, J., Elliott, A. and Sargatal, J. (2001) Handbook of the Birds of the World. Vol. 6: Mousebirds to Hornbills. Lynx Edicions, Barcelona.
   
5. Poonswad, P. (2007) Pers. Comm.
   
6. BirdLife International. (2001) Threatened Birds of Asia: the Birdlife International Red Data Book. Birdlife International, Cambridge, UK. Available at:
   http://www.rdb.or.id/index.html