The Alcon Blue Butterfly

This is a video excerpt from "Intimate Relations" an episode of Life in the Undergrowth (BBC).
The plot thickens...  butterfly larvae in the ants' nests are susceptible to parasitoid wasps....


Reference:

A Mosaic of Chemical Coevolution in a Large Blue Butterfly

Nash et al.
Science 4 January 2008: 88-90
DOI: 10.1126/science.1149180