Species Account

Select species and region:



Summary Data

Season (Adult / Immature):

National Status: Nb

Local Status: Very rare resident. No recent record.

Local Record: Grade 4   See here for explanation

Flight time: Jun-Jul.

Forewing: 21-25mm.

Foodplant: -

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 recorded19031903
Year last recorded19031903
Number of records12
Number of individuals12
Unique positions12
Unique locations12
Adult records12
Immature records00

For the region, we have a total of 2 records from 2 sites. Earliest record on file is in 1903.


2149 Silvery Arches 01
© Paul Harris

Species Account

For further information refer UK Moths.

Davey, P., 2009: A local and decreasing species confined to acid soils in the British Isles, the larva feeding on various herbaceous plants before hibernation and the young foliage of shrubs and trees, including birch (Betulae spp.) and sallow (Salix spp.), during the following spring. In Dorset, there are historical records close to substantial old oak/birch in Bere Wood before it was felled and replaced with conifer, and from old oak/birch woodland in the north-east of the county: Bloxworth, very sparingly (O Pickard Cambridge), Cranborne, on 7 July 1903 (F Fisher). It is recommended that trapping be undertaken in Boys Wood and Castle Hill Wood for this species.

This moth is similar in size and general appearance to Grey Arches2150. Diagnostics include: irregular but prominent black marks along subterminal line; ground colour silver-blue grey.


See background to species accounts.  Index of Vernacular names - Search - Random Species