A declining species which has now disappeared from many of its former haunts.
Open sandy, heathy or calcareous sites and open grassy areas within woodland, occasionally appears to wander.
Breckland stronghold, found at old-established Breck heathland sites and on re-stocked plantations within Thetford Forest.
Note: short forewing, well-defined black mark near the tip of the forewing and well defined crescent mark on hindwing diagnostic.
Recorded in 56 (81%) of 69 10k Squares.
First Recorded in 1900.
Last Recorded in 2020.