Colias alfacariensis - Berger's Clouded Yellow

These Pale Clouded Yellows are really difficult to tell from the species that holds the name. A slightly more rounded shape to the wings seems to be the most seperable feature. I don't actually think I have any  butterfly photographs of the other species, though several times I have thought I did. 

These shots were taken too far south, in France and Spain, to be anything other than Berger's. 

Colias-alfacariensis-bergers-clouded-yel | PTKbutterflies
Colias-alfacariensis-bergers-clouded-yel | PTKbutterflies
Colias-alfacariensis-bergers-clouded-yel | PTKbutterflies
Colias-alfacariensis-bergers-clouded-yel | PTKbutterflies