Clouded Yellow
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Colias croceus
Common migrant from North Africa to Britain.
A Helice form also occurs in Britain.
The upperside of the wings is golden to orange yellow with a broad black margin on all four wings and a black spot near the centre forewing.
Like all Colias species they never open their wings while at rest.
In flight, Colias croceus is easily identifiable by the intense yellow colouring, much brighter than that of the lemon-yellow male Common Brimstone which also lacks black markings.
Flight period is from May-November, but can turn anywhere between May-September.
The Larvae, sadly don't usually survive our British winters.