Geometridae : Ennominae
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Photo © Julian Francis

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

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

Davey, P., 2009: A frequent species in southern Britain, more local further north, the larva feeding on oak (Quercus spp.), lime (Tiliae spp.) and birch (Betula spp.). In Dorset, the moth is restricted to old birch and oak woods; it is seldom found in open country. It has also been trapped in suburban areas such as Wimborne, where lime (Tilia platyphyllos x cordata) is likely to the host plant. September Thorns between mid-July and mid-August are smaller and paler than their... Read More

Recorded in 25 (63%) of 40 10k Squares.
First Recorded in 1930.
Last Recorded in 2019.
(Data up to end 2019)
Additional Stats

Forewing: 17-21mm
Flight: July - October
Foodplant:   Oaks, birches, limes, Beech
Red List: Near Threatened (NT)
GB Status: Common
BAP Status: Declining (Research only)
Verification Grade:  Adult: 2
< Dusky Thorn  |  Early Thorn >
List Species Records   [Show All Latest]
Latest 5 Records (data up to end 2019)
Date#VC10k Area
22/09/201919ST61 Sherborne
21/09/201919SY79 Puddletown
15/09/201939SU00 Wimborne
13/09/201919SU00 Wimborne
10/09/201919SU00 Wimborne

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