Mike photographed these Clouded Yellows on 5/11/17 at Southbourne Undercliff.
This photograph shows a male and female and it is worth noting that the markings differ between the sexes. Male Clouded Yellows have a dark marginal borders on upper wings whilst the female has dark marginal borders enclosing yellow spots on upper wings. It is quite unusual to see this species with open wings, allowing us to see the dramatic colours of the upper fore and hind-wings.
Mike has also captured the female displaying the mating refusal pose. In all a very worthwhile reference photograph.
This species is a migrant, but it is thought that at Southbourne some may overwinter on the Undercliff, though it is unlikely many survive as the caterpillars and pupa are susceptible to frost and damp.