Species Account

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Summary Data

Season (Adult / Immature):

National Status: Rare migrant

Local Status: Rare migrant.

Local Record: Grade 4   See here for explanation

Flight time: Jul-Sep.

Forewing: 18-22mm.

Foodplant: Mullein and Mallow.

IMPORTANT - Please note that the maps and accounts are provisional, subject to change and further update.  The whole dataset still needs to go through the final verification process and it is likely that a very small number of records will not satisfy the present requirements and there are other records that have not been formally submitted.  The information is for guidance only.

Record breakdown:

Year first recorded19471947
Year last recorded20082008
Number of records48
Number of individuals48
Unique positions36
Unique locations36
Adult records48
Immature records00

For the region, we have a total of 8 records from 6 sites. Earliest record on file is in 1947.


2430 Scar Bank Gem 01
© Martin Cade, 24 Aug 2007

Species Account

For further information refer UK Moths.

Davey, P., 2009: A rare immigrant species seen on ten occasions in Britain, resident in Africa, and a transitory resident in southern Iberia, the polyphagous larva feeding on various wild and cultivated herbaceous plants. In Dorset, the moth has been seen on six occasions at light traps, the first of these (see photo) was the first British record, and the species acquired the name 'Scar Bank' after the place where it was caught: West Bexington, on 10 October 2008 (R Eden), Scar Bank, on 13 September 1947 (A Russell), Portland, on 29 July 1997, 24 August 2007 (M Cade), Durlston, on 17 September 1992 (via Durlston Country Park). The airflows on most occasions have tended to originate over western Iberia and the Atlantic coast of North Africa, although there was negligible opportunity for immigration from the south for up to three weeks prior to the record date in the case of the 2007 example. This species resembles Silver Y2441 superficially, but the 'V' part of the 'Y' is more like a 'U'; it more closely resembles Ni2432.

Diagnostics include: a violet hue across the forewing; a pale patch on the central edge of the forewing.


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