Sleeping Black - Veined Whites & Owly sulphurs

At a slope near Nevache, a number of Black-Veined Whites and some Owly Sulphurs were sleeping.

This last type of insect looks crazy, when awake it's very attentive, just flying away or hiding behind a blade of grass, watching each move you make and turning away, so you only see some eyes moving in circles. 

Later that week, the grassy slope turned into a muddy area taken over by an avalanche full of dirt, stones and mud: a thunderstorm had blocked not only our way, but as well shaped the meadow into a 40 centimetres mud arena.  I wonder whether these insects survived.