Davey, P., 2009: A widespread species in Britain, the larva feeding on various herbaceous plants before hibernation and the young foliage of shrubs and trees the following spring. In Dorset, the moth is frequent, locally common, in deciduous woodland throughout the county, but rare or absent in open country. The national norm is for a single brood in June and July, but in Dorset the primary brood is centred on July. Examples of moths in mid-May suggest an occasional partial first brood. Moths noted in mid-August are possibly second brood examples of this secondary brood cycle.

This species is often mistaken for Triple-spotted Clay2127. Diagnostics include: a paler ground colour that is unlike that of the Triple-spotted Clay and Setaceous Hebrew Character2126; an absence of a smoky black suffusion across the upper half of the forewing; pale-coloured stigmata contrasting sharply with 'Double Square-spot'.

Recorded in 39 (98%) of 40 10k Squares.
First Recorded in 1940.
Last Recorded in 2019.
(Data up to end 2019)