This species has pronounced sexual dimorphism. The male has a costal fold on the forewing and is usually smaller and more brightly coloured. The female has no costal fold and has a much more protruding apex on the forewing.
Recorded in 124 (45.9%) of the 270 2km squares of Huntingdonshire.
Last recorded in July 2023
Recorded date range (Adult): 17 May to 08 October
Recorded date range (Larva/Leafmine): 09 May to 12 July