Localised to the Norfolk coast.
Diagnostic white streaks running length of forewing, with brilliant white hindwing.
Coastal sand-dunes, beaches.
Almost always is double brooded in Norfolk, the second brood may usually be quite small but in good years it can be even larger than the first.
Recorded in 18 (26%) of 69 10k Squares.
First Recorded in 1834.
Last Recorded in 2020.