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 2 (0.7%) of the 270 2km squares of Huntingdonshire.

Last recorded in July 2019

Recorded date range (Adult): 15 June to 25 July