Norfolk status Believed to be over-recorded in Norfolk. Very similar to Red Twin-spot Carpet, which has a dark-barred form.
The notch on the inner edge of the cross-band, close to the costa, has proven to be an unreliable method to identify this species.
Can be separated by the underside of the forewing being uniform grey with little contrast. Red Twin-spot Carpet shows a contrasting pattern with deep ginger colouration towards the apex of the underside.
Red Twin-spot Carpet also has a dark-barred form, leading to confusion, however a red-barred form of Dark-barred Twin-spot Carpet is rare and should be treated as indistinguishable without dissection of the genitalia.
Only classic examples should be assigned to this species without dissection of the genitalia.
Recorded in 65 (88%) of 74 10k Squares. First Recorded in 1873. Last Recorded in 2024. Additional Stats
