The Large Blue butterfly reintroduction is one of the conservation success stories of recent times. Declared extinct in 1979, it has been successfully reintroduced to a number of sites in the south-west of England.
1. Recent political agreements mandate that the current rate of biodiversity loss is reduced by 2010 (the 2010 target). In Europe one of the 26 indicators given for this assessment is butterfly biodiversity which therefore requires butterfly biodiversity to be measured. Feest et al. (2010) advocates that this can be done using the concept of “Biodiversity Quality”.