Description: Wingspan 24-27mm. Adults are usually pale grey with a dark central band across the forewings. This black banded form ab. unidentaria is much more widespread and predominates over the scarcer red-banded form, which is occasionally seen at light. From the beginning of April to early September.

Irish Distribution: Widespread and commonly encountered in southern counties. Much scarcer further north, where records are mainly from coastal sites. Recorded from Rathlin Island, Antrim in the late 1980s. This species occurs in similar habitats to the Red Twin-spot Carpet X. spadicearia which may account for some misidentifications.

Ecology: Found in a variety of habitats including bogs, fens, and some suburban gardens. Adults come to light frequently and in moderate numbers. The larvae have been reared in captivity on dock Rumex spp and bedstraws Galium spp. It overwinters as a pupa.

Key Identification Features:

• Dark central band across the forewings.
• Different colour forms
• Inner marginal line on band notched at costa
• Closely resembles Red Twin-spot Carpet

Distribution Map from NBN: Xanthorhoe ferrugata at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Xanthorhoe ferrugata at iNaturalist World Species Observations database.