Season (Adult / Immature):
National Status: Migrant
Local Status: Uncommon and thinly distributed migrant.
Local Record: Grade 3 See here for explanation
Flight time: Apr-Nov, (mostly Aug-Oct)
|Year first recorded||1905||1987||1905|
|Year last recorded||2011||2009||2011|
|Number of records||1504||56||3120|
|Number of individuals||5747||104||11702|
For the region, we have a total of 3120 records from 230 sites. Earliest record on file is in 1905.
For further information refer UK Moths.
Davey, P., 2009: An immigrant species observed most often in the southern-most counties of England and very occasionally further north, the larva feeding on various soft-bladed grass species such as cock's-foot (Dactylus glomerata). In Dorset, the moth has been recorded in sixteen out of the past twenty-one years. Annual frequency has varied enormously from scarce to abundant with the highest numbers in coastal areas. "This is an insect that is unable to tolerate the climate of these islands, but can manage for a year or two to continue to be tolerable to it, and then if the weather deteriorates it dies out and there is a gap in records till fresh immigration enables it to repeat the process." (W Parkinson Curtis ms). Recent data suggests that many moths are primary immigrants from abroad. Large single peaks on 10 October 1991, 23 May 1992, 19 October 2001, 14 September 2006 occurred on dates when airflows were direct from the Mediterranean; such peaks indicate massive outflows of moths at their point of departure at relatively low latitudes. Small numbers of adults were recorded during the second half of June 1993 at West Bexington and more widely in early June 2007, and with little opportunity for immigration from southerly sources during these two periods, it seems likely that the species managed to overwinter here as direct descendants from the huge numbers in 1992 and 2006. Dark well-marked examples indicate a northern European source whereas relatively unmarked examples are likely to have originated from markedly higher-temperature environments such as that experienced in northern Africa.