Geometridae : Ennominae
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Photo © Ben Sale,  Bishops Stortford Cemetery, Hertfordshire (03/08/21)

Similar Herts & Middlesex Species
August Thorn
Ennomos quercinaria
Dusky Thorn
Ennomos fuscantaria
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Canary-shouldered Thorn
Ennomos alniaria

(Linnaeus, 1758) 1913 / 70.234

General comments:
Extremely local resident.

Readily distinguished by the canary-yellow thorax, this is a very common species, especially in woodlands but also in gardens and most other habitats. It may have declined numerically, though there is no particular evidence that it has diminished in terms of geographical distribution.

Recorded in 31 (76%) of 41 10k Squares.
First Recorded in 1887.
Last Recorded in 2023.
Additional Stats

< August Thorn  |  Dusky Thorn >

List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
15/09/2023120TL23 - Letchworth / Baldock
09/09/2023120TL23 - Letchworth / Baldock
08/09/2023120TL23 - Letchworth / Baldock
08/09/2023120SP91 - Tring
07/09/2023120TL42 - Bishop's Stortford (N)
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record Canary-shouldered Thorn
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VC20 VC21 VC21 VC20
Click Map for Details
Forewing: 16-20mm.
Flight: One generation July-Oct.
Foodplant:   Downy and Silver Birch, Alder, limes, elms
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 1
 Immature Adult   [Show Flight Weeks]
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