Characteristic sharply angled median fascia edged with dark ground colour.

Larvae create a narrow mine downwards until reaching water surface, when either returns upward or changes leaf.

borders of ponds, lakes and slow moving streams where foodplant grows in standing water.

Recorded in 3 (1.1%) of the 270 2km squares of Huntingdonshire.

Last recorded in May 2020

Recorded date range (Adult): 24 May to 25 July