Noctuidae : Noctuinae
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Photo © Chris Jones,  21/07/2010 Croxton

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Grey Arches
Polia nebulosa
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Great Brocade
Eurois occulta

(Linnaeus, 1758) 2137 / 73.350
Norfolk status
(Resident in the Scottish Highlands)

The resident Scottish populations are usually very dark, while the immigrants are much paler and greyer.

Most Norfolk records occur in August and September, the adults comes to sugar and light.

The larvae feed mainly on Bog Myrtle, but also other plants and bushes, such as Sallow and Birch.

In mid June 2010 two larvae were found feeding on scrub Birch in the Norfolk Brecks, (Chris Jones, 16/06/10), they pupated on the 17th June, with adults emerging on the 19th and 20th July 2010. The adults were of the pale grey form associated with immigrant specimens. Unfortunately no specimens were retained for confirmation.
The discovery suggests that in 2010, at least temporarily, there was a breeding population in the Brecks.

Retained Specimen / Photograph will be Required.

Recorded in 43 (58%) of 74 10k Squares.
First Recorded in 1873.
Last Recorded in 2021.
Additional Stats

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List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
31/07/2021127TG33 - Bacton
23/07/2021127TG01 - Lyng/N.Tuddenham
15/07/2021127TG31 - Horning/Hoveton
07/08/2019128TF63 - Snettisham/Dersingham
06/08/2019+28TF52 - Terrington
Show Details | 1990 to 2020 | 2000 to 2020 | Graph Key
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Copyright © Jim Wheeler 2021

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Forewing: 24-27mm.
Flight: Immigrants arrive Aug-Sept.
Foodplant:   Bog-myrtle plus other plants including Sallow and Birch
Nat Status: Nationally Scarce B
Verification Grade:  Adult: 3
 Immature Adult

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Underlying maps using Digital Map Data © Norfolk Online Lepidoptera Archive - NOLA™ 2021. © James Wheeler - Norfolk Moths 2007 - 2021. Data © NOLA™ 2021
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