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.
References
ITIS, the Integrated Taxonomic Information System (September, 2009) http://www.itis.gov
Mullarney, K., Svensson, L., Zetterstrom, D. and and Grant, P.J. (1999) Collins Bird Guide.HarperCollins Publishers Ltd, London.