Davey, P., 2009: A local species of fenland in England, the larva feeding on the inner parts of wood small-reed (Calamagrostis epigejos). In Dorset, the moth is common very locally on sheltered old grassland or in woodland on ill-drained clay soils. The majority of sites are in the centre and in the west of the county, and all host varying amounts of wood small-reed. It is recommended that the species is included in habitat management plans for the Rooksmoor, Powerstock Common and Bracketts Coppice sites, respectively. All resident records (mainly light trap) follow: Studland Wood, at sugar on 9 July 1937 (A Russell), Charmouth, on 1 July 1995 (Dr J Clarke), Bracketts Coppice, three on 25 July 1997 (P Davey), Clifton Wood, eighteen on 14 July 2004 (P Butter, P Davey, J Astley), Drakenorth, two on 29 June 1997 (P Davey), Powerstock Common, thirty on 20 July 1996 (R Cook, J Chainey), on 27 July 1997 (D Foot, M Forster), on 21 July 2000 (R Cook et al), on 1 July 2001 (R Cook, D Humpreys), on 11 August 2001 (M Forster et al), two on 29 June 2004 (N Croton, P Davey), twenty on 24 July 2004 (P Davey), Rooksmoor, sixty-two on 23 July 1997 and one on 7 August 1998 (P Davey), seven on 13 July 2003 (C Manley, P Davey), Melcombe Park, twenty on 25 July 2004, two on 1 August 2004 (Hugo Wood Homer), Woolland, on 1 August 1997 (P Benham).

The following light trap examples are suspected immigrants from the Continent: Scar Bank, on 27 July 1948 (A Russell), West Bexington, on 10 July 1995 (R Eden), Warre Wood, on 5 August 2004 (Dr P Sterling), Upwey, 30 July 2001 (P Harris), Portland, on 29 July 1991, three on 5 August 1996, 26 June 2001, 28 July 2006 (M Cade), Forston, on 5 August 2004 (Dr P Sterling), Puddletown, on 28 July 2004 (Hugo Wood Homer), Oakers Wood, on 1 July 1994 (P Davey).