Wingspan 13-18 mm.
This species can be found on open uncultivated and waste ground and similar habitats throughout much of the British Isles. though it is more local in Scotland.
The foodplant is ragwort (Senecio jacobaea), the larvae feeding internally in the stems or roots.
The moths are bivoltine in the south, flying from May to July and again from late July to September. In Scotland there is one generation, in June and July. The moths can sometimes be found at rest on the foodplant by day.