The Apollo (Parnassius apollo) is a big white butterfly (one of the biggest in Europe): its red and black eye-spots are typical. This endangered and protected species can be found on the way to Saint Guilhem, especially on the Causse de Sauveterre. In fact, this mountain butterfly requires wide open spaces and a large surface of lawns (the scarcity of the species is due to habitat loss). You may see it flying when the weather is sunny, in June or July, foraging nectar from purple flowers (thistles, scabiosa…). It alights as soon as there is a cloud.