The Phengaris arion caterpillars parasitically prey on the species as it hatches on thyme buds and then tricks the ants into believing it is one of their own larvae, ants then carry it to their nest where it feeds on the ant grubs.
Alleyne, Richard (16 June 2009). "Large Blue butterfly flutters back from extinction, thanks to a tiny ant". The Daily Telegraph. London. Retrieved 16 June 2009.
