Berger's Pale Clouded Yellow

Colias alfacariensis

Courting couple, Switzerland, 2006

Male, Switzerland, 2007

Female, Switzerland, 2007

Female, Switzerland

Same female

I am fairly certain all these pictures show Berger's clouded yellow, rather than pale clouded. The two species are very difficult to separate unless you get exceptionally close views, like these. The first couple shows the details of the upperside, including the very bright orange spot of the male and there is no doubt about them.

The species is more sedentary than pale clouded yellow and more restricted to calcarious soils. In Switzerland Berger's is the default species and is much commoner around me.