Season (Adult / Immature):
National Status: Local
Local Status: Uncommon and thinly distributed resident.
Local Record: Grade 2 See here for explanation
Flight time: Two generations, late Jun-Aug and Sep-Oct, overwinters to Spring
Foodplant: Pedunculate Oak and Sessile Oak.
|Year first recorded||1973||2007||1985||1973|
|Year last recorded||2011||2007||2011||2011|
|Number of records||393||1||56||900|
|Number of individuals||425||1||68||988|
For the region, we have a total of 900 records from 250 sites. Earliest record on file is in 1973.
For further information refer UK Moths.
Davey, P., 2009: A local species in southern England, rare elsewhere, the larva feeding on oak (Quercus spp.). In Dorset, the moth is at low density and found in a wide range of habitats, most often in woodland. The moth has been trapped fairly regularly at Durlston, and in this locality evergreen oak (Quercus ilex) is a likely host plant. It has also been recorded from coastal situations where there is little or no oak, and dispersal or immigration is suspected for many of these: Eype's Mouth, on 13 October 2008, West Bexington, on 21 July 2000, 19 January 2003, 8 July 2003, 12 and 20 February, 20 March, 13 April 2004, four between 20 and 26 July 2004 (R Eden), Portland, on 17 July 2006, 8 October 2006, 7 April 2007, 11 August 2007 (M Cade), Studland Heath, on 21 September 1989 (P Davey), Shell Bay, on 1 October 1990 (P Davey).
The national norm is of a single brood emerging in late August and September before hibernating and becoming active once more between March and May. In Dorset, the moth is double brooded, with a discrete generation between late June and mid-August that is on average twice as large as the winter brood. The post-hibernation population is one and a half times larger than that observed during the autumn, and a partial spring emergence is suspected. The small peak in November may be a partial second brood spawned by the July moths, and the small peak in February corresponds with the winter immigration of 2004.