73.261 (2150) Grey Arches Polia nebulosa (Hufnagel, 1766)

Resident. Local.
Flight period

Lennon (1863) stated it to be common in his 'List of Lepidoptera taken near Dumfries.' Gordon (1913) had found it common some years at sugar in woods around Corsemalzie, Wigtownshire. The larvae were not uncommon being found crawling up elm trunks after dark, same area. Earliest date 26th June 1896 with the latest 1st October 1897, which must be a larvae date.
Sir Arthur Duncan (1909-84) during his lifetime had found it at Tynron (VC72). In the same county a series of moths were trapped at Irvine House Lodge, Auchenrivock in 1974.
During 1974-93 only twenty records were recorded from five of the Rothamsted stations, the two in Dumfriesshire not recording, which rings true for the species as there are very few records for that county.
During 1981-85 it was trapped regularly on the Hensol Estate (VC73), but from 1993 to 2010 the regular trapped sites at Cally Woods, Carsfad near Dalry and Kirkcudbright, provided most of the records, with otheres from a small scattering of sites across its stronghold, Kirkcudbrightshire. Just two records in Wigtonwshire during the same period, from Forest Moor.
Life cycle
One generation. Overwinters as a part-grown larva in leaf litter on the ground between August and May. Pupation takes place in loose earth from a cocoon.
Larval foodplants
Bramble, Honeysuckle, Silver Birch, Hazel and sallows.
The strongly curved greyish forewing with a dark dash or arrowmark in the trailing corner, pale kidney-mark and oval with dark outlines should aid identity.
Broadleaved woodland.
© Keith Naylor, Galloway Woodland Park, 19 June 2004
© Peter Robinson, Carsluith, 8 July 2007

Local distribution map

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Distribution map displays records from the National Biodiversity Network (See terms and conditions).

The following datasets are included:

  • Butterfly Conservation - Macro-moth provisional distribution for the British Isles (excluding the Republic of Ireland) from the National Moth Recording Scheme
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