Silver-studded blue  (Plebeius argus)

Calcareous: Containing free calcium carbonate, chalky.
Genus: A category used in taxonomy, which is below ‘family' and above ‘species'. A genus tends to contain species that have characteristics in common. The genus forms the first part of a ‘binomial' Latin species name; the second part is the specific name.
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
Larval: Of the 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.
Myxomatosis: A contagious viral disease in rabbits.
Pupa: Stage in an insect's development when huge changes occur, which reorganise the larval form into the adult form. In butterflies the pupa is also called a chrysalis.
Re-introductions: Attempts to establish a native species back into an area where it previously occurred.

1. Still, J. (1996) Collins Wild Guide: Butterflies and Moths of Britain and Europe. HarperCollins Publishers, London.
   
2. Carter, D.J. and Hargreaves, B. (1986) A Field Guide to Caterpillars of Butterflies and Moths in Britain and Europe. Collins, London.
   
3. Asher, J., Warren, M., Fox, R., Harding, P., Jeffcoate, G. and Jeffcoate, S. (2001) The Millennium Atlas of Butterflies in Britain and Ireland. Oxford University Press, Oxford.
   
4. UKBAP Species Action Plan (March, 2002)
   http://www.ukbap.org.uk/UKPlans.aspx?ID=522
   
5. Ravenscroft, N.O.M. and Warren, M.S. (1996) Species Action Plan: silver-studded blue, Plebejus argus. Butterfly Conservation, Wareham. Available at:
   http://www.butterfly-conservation.org/uploads/ssb_action_plan.pdf
   
6. Butterfly Conservation, Bulman, C. (2002) Pers. Comm.