This species can be recognised by the black 'shoulder-knot' - a streak at the base of the forewing.
Pupates on or in the ground.
Grassland, woodland, scrub, heathland, fens and gardens.
Recorded in 121 (44.8%) of the 270 2km squares of Huntingdonshire.
Last recorded in July 2021
Recorded date range (Adult): 13 April to 01 October
Recorded date range (Pupa): 06 May to 06 May