Description: Wingspan 24-27mm. Adults are a pale, greyish colour with a silky sheen on the wings. There are a series of ochreous medial lines across all wings with a distinctive fringe and small black discal spot - this may appear to be absent in some specimens which are slightly worn when found, making their identification difficult. Mid June to early August.

Irish Distribution: Local, recorded mainly from Brackagh Moss, north Armagh; Montiaghs Moss, Antrim and several sites in south Down, notably Derryleckagh Wood and Lackan Bog. The moth is probably more widespread than records suggest and the recent spate of records is because it has been overlooked rather than a genuine increase in range.

Ecology: This species favours bogs, fens and marshy localities. The larvae can be found from September until May on wetland herbs such as Meadowsweet Filipendula ulmaria and Common Valerian Valeriana officinalis usually at night. Adults appear sparingly at light and their condition when captured is often poor, making it difficult to confirm their identification. Adults can occasionally be disturbed from the vegetation during the day. It overwinters as a pupa.

Key Identification Features:

• Black distal spot on forewing
• Silky sheen on the wings
• Fringe on all wings

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

iNaturalist: Scopula immutata at iNaturalist World Species Observations database.