Geometridae : Larentiinae
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Photo © Lynnette Nicholson, Mark Golley,  24/06/2022 - Cley

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Similar Norfolk Species
Red Twin-spot Carpet
Xanthorhoe spadicearia
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Dark-barred Twin-spot Carpet
Xanthorhoe ferrugata

(Clerck, 1759) 1725 / 70.052

Norfolk status
Believed to be over-recorded in Norfolk.
Very similar to Red Twin-spot Carpet, which has a dark-barred form.

The notch on the inner edge of the cross-band, close to the costa, has proven to be an unreliable method to identify this species.

Red Twin-spot Carpet also has a dark-barred form, leading to confusion.
However a red-barred form of Dark-barred Twin-spot Carpet is apparently rare and should be treated as indistinguishable without dissection of the genitalia.

Using caution, only classic examples with solid black cross-bands should be assigned to this species without dissection of the genitalia.

Recorded in 65 (88%) of 74 10k Squares.
First Recorded in 1873.
Last Recorded in 2023.
Additional Stats

< Red Twin-spot Carpet  |  Flame Carpet >

Determination
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10kGeneral Area
11/09/2023128TF63Dersingham
10/09/2023+28TL78Weeting Heath (Gravelpit Wood)
10/09/2023128TF92Stibbard
09/09/2023128TF83Syderstone
09/09/2023128TF51Walpole Highway
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record Dark-barred Twin-spot Carpet
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Forewing: 12-13mm.
Flight: Two Generations. May-Jun. Jul-Aug.
Foodplant:   Herbaceous plants
Red List: Near Threatened (NT)
GB Status: Common
BAP Status: Declining (Research only)
Verification Grade:  Adult: 2
 Immature Adult   [Show Flight Times]

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Underlying maps using Digital Map Data © NOLA™ 2024. © Lepidoptera UK - Jim Wheeler - Norfolk Moths 2007 - 2024. Data © NOLA™ 2024
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