Davey, P., 2009: A regular long-range immigrant whose numbers vary greatly year to year, the larva feeding on clovers (Trifolium spp.), knotgrass (Polygonum aviculare) and various grass species. In Dorset, the moth has been recorded in every month of the year, and in favourable seasons late spring immigrations spawn large indigenous broods during the late summer and the autumn. These resident populations are often augmented by further waves of immigrants from the Continent, and in favourable seasons, numbers can become staggeringly large. Three main broods are suspected with a period of fifty-two days on average, between each peak. There is no indication that the moth can survive the winter here in the UK.