Season (Adult / Immature):
National Status: Nb
Local Status: Rare and very local resident/wanderer.
Local Record: Grade 4 See here for explanation
Flight time: May-Jun.
Foodplant: Thought to be Tormentil.
|Year first recorded||1933||1986||1933|
|Year last recorded||2011||2011||2011|
|Number of records||27||22||98|
|Number of individuals||39||21||120|
For the region, we have a total of 98 records from 42 sites. Earliest record on file is in 1933.
For further information refer UK Moths.
Davey, P., 2009: A local species confined to south-east England, but in recent years has spread westwards, the larva feeding on tormentil (Potentilla erecta). In Dorset, the species was first encountered in the far east of the county at Matchams in 1986, and up to 2007 just a handful of sites elsewhere across the Poole Basin. In these places the species favours open woodland on sandy soils, particularly where bracken flourishes in warm, sheltered gulleys: Trigon, five at MV on 13 July 1996 (C Manley, P Davey), 17 June 1998 (C Manley), St Leonards Peats, at MV on 6 July 1998 (P Davey), St Ives, at MV on 20 June 1989 (Dr J Clarke), Ringwood Forest, 2 July 2008 (R Goff), Hurn, at MV on 27 May 2003, 13 June 2003, 18 June 2003, two on 23 June 2005, 27 June 2005, 17 and 25 May 2006, 6 and 7 June 2006, 7 June 2008 (M Jeffes), Sopley Common, at MV on 3 June 2000 (M Jeffes), Matchams, at MV on 16 June 1986, 1 July 1986 (G Le Pard). In 2007, trapping was undertaken in Chase Woods containing extensive areas of oak, birch and maple, but also with relatively large quantities of bracken (Pteridium aquilinum), so a rather different biotype to bracken-clad heathland. This was a site that had been researched fairly regularly during the 1990s, and no Rosy Marbled was observed in the traps at that time, however in 2007, colonisation was clearly evident: Scrubbity Barrows, four on 16 June 2007 (P Davey et al).
The following moths were trapped well away from suitable habitat, the first on a very late date given that the moth is single brooded between mid-May and mid-July in the UK: Scar Bank, at light on 28 August 1933 (A Russell); this was likely to have been a second brood immigrant. The other light trap examples were recorded during high immigrant activity: Shapwick, on 25 June 2001 (P Davey), Kingston, on 18 June 2005 (P Benham), France Down, on 12 June 2006 (M Parsons, P Davey). Central or northern France is a potential source given that hot south-easterly airflows were established on all four occasions.