This moth is sexually diamorphic with the male being significantly smaller and whiter than the female. It has a diagnostic dark ring with a whitish centre on the forewing.
The larvae are entirely aquatic.
Wetland areas including gardens.
Recorded in 113 (41.9%) of the 270 2km squares of Huntingdonshire.
Last recorded in August 2019
Recorded date range (Adult): 21 May to 02 October