Rare moment to
see the upperside as the butterfly flits from one flower to another.
This is
a high mountain butterfly only found in the Cantabrian mountains,
Pyrenees, Alps and a small part of the Romanian Carpathians. It is
clearly a member of the Clouded Yellow family but is one of the palest
yellow and most heavily dusted with grey scales. I usually associate it
with similar places to the Moorland Clouded Yellow, Colias palaeno
with which I have found it flying. Just as palaeno, it flies fast and
erratically over open grassy areas where it can be very hard to get
close to.