Noctuidae : Noctuinae
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Photo © George Fowler,  Broxbourne, Hertfordshire (09/06/21)

Similar Herts & Middlesex Species
Purple Clay
Diarsia brunnea
Small Square-spot
Diarsia rubi
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Ingrailed Clay
Diarsia mendica

(Fabricius, 1775) 2120 / 73.333

General comments:
Widespread but local resident.

There is a great degree of variation in colour and pattern of the forewings, but this has not been documented for our area. A decline in numbers was noted from about 1980 onwards in parallel with the species disappearing from some traditional sites. However, by about 2018 numbers had returned to a near normal level and several of the empty sites had been re-colonised. A few old sites remain vacant at 2022 but moth numbers continue on an upward trend; these these variations are thought to be "normal".

Recorded in 36 (88%) of 41 10k Squares.
First Recorded in 1887.
Last Recorded in 2023.
Additional Stats

< Purple Clay  |  Small Square-spot >

List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
08/07/2023220SP91 - Tring
30/06/2023120TL42 - Bishop's Stortford (N)
28/06/2023220TL31 - Hertford
27/06/2023120TL31 - Hertford
24/06/2023620TL00 - Hemel Hempstead
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
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VC20 VC21 VC21 VC20
Click Map for Details
Forewing: 13-17mm.
Flight: One generation June-July.
Foodplant:   Herbaceous plants
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 1
 Immature Adult   [Show Flight Weeks]
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