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 112 (41.5%) of the 270 2km squares of Huntingdonshire.
Last recorded in September 2018
Recorded date range (Adult): 21 May to 02 October