Geometridae : Larentiinae
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Photo © Kevin Leighton,  19/07/2012 - Stow Bardolph

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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.

Can be separated by the underside of the forewing being uniform grey with little contrast. Red Twin-spot Carpet shows a contrasting pattern with deep ginger colouration towards the apex of the underside.

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 rare and should be treated as indistinguishable without dissection of the genitalia.

Only classic examples 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 2024.
Additional Stats

< Red Twin-spot Carpet | Flame Carpet >

Determination
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10kGeneral Area
15/09/2024128TL79Mundford
09/09/2024128TF63Dersingham
08/09/2024128TF63Dersingham
08/09/2024+28TL78Weeting Heath (Gravelpit Wood)
08/09/2024128TF63Snettisham / Ingoldisthorpe
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record Dark-barred Twin-spot Carpet
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Copyright © Lepidoptera UK 2024
   
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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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