Easily identifiable as an adult.
Overwinters as a larva for two years, the first one-and-a-half years in a small pistol-case, and in the second spring building a long straight case.
Recorded in 26 (9.6%) of the 270 2km squares of Huntingdonshire.
Last recorded in May 2023
Recorded date range (Adult): 26 May to 10 August
Recorded date range (Larva/Leafmine): 24 May to 10 October