The bands on the forewing run parallel unlike other swift moths.
Mainly flies at dusk near to food plant, but sometimes at dawn as well.
Overwinters twice as a larva. Pupates underground.
Open woodland, heath and rough grassland.
Recorded in 27 (10%) of the 270 2km squares of Huntingdonshire.
Last recorded in May 2017
Recorded date range (Adult): 22 May to 01 July