Geometridae : Ennominae
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Photo © Lynnette Nicholson,  24/07/2021 - Cley

Similar Norfolk Species
Large Thorn
Ennomos autumnaria
Canary-shouldered Thorn
Ennomos alniaria
Dusky Thorn
Ennomos fuscantaria
September Thorn
Ennomos erosaria
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August Thorn
Ennomos quercinaria
(Hufnagel, 1767) 1912 / 70.233

Norfolk status
One of several similar 'Thorns'.
Woodland, parkland, hedgerows, scrub and gardens

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

Recorded in 57 (77%) of 74 10k Squares.
First Recorded in 1873.
Last Recorded in 2023.
Additional Stats

< Large Thorn  |  Canary-shouldered Thorn >

Determination
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10kGeneral Area
21/09/2023128TF83North Creake
31/08/2023128TF83North Creake
27/08/2023128TF83North Creake
23/08/2023127TM28Needham
21/08/2023228TF83North Creake
 Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record August Thorn
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Forewing: 18-22mm.
Flight: One generation Aug-Sept.
Foodplant:   Pedunculate Oak and Sessile Oak
Red List: Least Concern (LC)
GB Status: Common
BAP Status: Declining (Research only)
Former Status: Local
Verification Grade:  Adult: 1
 Immature Adult   [Show Flight Times]
Further info: Ennomos quercinaria
 
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