On Aug 10, 2008, philomel from Castelnau RB Pyrenées France (Zone 8a) wrote:
This butterfly is also rare in the UK and has only one brood per year in northern europe. However, here in SW France they have 2 or even 3 broods a year. The caterpillars eat umbelliferous plants and are very fond of fennel, so that is a plant I am sowing and transplanting around the garden to ensure a good supply of food. The adults enjoy sunny places with nectar rich flowers such as buddleia and verbena bonariensis.