Wingspan about 14 mm. This species can be confused with I. masculella, but the yellowish marking on the costa, if present on masculella is closer to the head than the opposing tornal spot. In oehlmanniella, it is closer to the wingtip. In addition, the males of oehlmanniella have simple antennae.
Around the larval foodplants.
The adults fly in June and July.
The larvae feed on Bilberry and Cloudberry at first mining the leaves, then cutting out a portable case and dropping to the ground, where they feed on dead leaves.
The distribution covers much of the British Isles, where in the north it can be found at high altitudes. In the Butterfly Conservation’s Microlepidoptera Report 2011 this species was classified as common.
It appears to be uncommon in Leicestershire and Rutland, where there are few records. L&R Moth Group status = D (rare or rarely recorded).
Leicestershire & Rutland Map
Enter a town or village to see local records
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015