The days of the Clouded Yellow - trying to unravel a butterfly puzzle

Wandering around the flower meadows in this part of the Tarn at this time of the year shows just how common the Clouded Yellow is in these parts. Up until 1945 there was some confusion as to just how many species of 'Clouded Yellow' there were. The Clouded Yellow proper (Coleas croceus) is the one that people who live in the UK are mostly likely to see. Most of them arrive in the UK as migrants from Southern Europe and the species seldom survives the damp, cold, English winters. Coleas crocus is