Geometridae : Ennominae
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Photo © Stephen Youngs,  09/09/2018 - Pedders Way

Similar Norfolk Species
August Thorn
Ennomos quercinaria
Canary-shouldered Thorn
Ennomos alniaria
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September Thorn
Ennomos erosaria

([Denis & Schiffermüller], 1775) 1915 / 70.236

Norfolk status
Local but infrequent, scarce in recent years.
Woodland and gardens.

Very similar to August Thorn. August Thorn has white "socks" on each leg, and a flat resting posture, which separates it from the similar September Thorn. (September Thorn rests with wings raised)

Recorded in 47 (64%) of 74 10k Squares.
First Recorded in 1873.
Last Recorded in 2023.
Additional Stats

< Dusky Thorn | Early Thorn >

Determination
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10kGeneral Area
14/09/2023128TF70Cockley Cley
05/09/2023128TL79Cranwich
21/08/2023128TF70Beachamwell
17/08/2023128TF83North Creake
29/07/2023+27TG30Surlingham
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record September Thorn
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Forewing: 17-21mm.
Flight: One generation July-Oct.
Foodplant:   Oaks and birches limes, Beech
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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