Geometridae : Ennominae
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Early Thorn
Selenia dentaria

(Fabricius, 1775) 1917 / 70.237

General comments:
Widespread resident.

The males and females of Early Thorn are of different appearance and both differ between the spring and summer generation. All rest with wings firmly closed over the back in the manner of a butterfly - a fact that easily separates them from the Purple Thorn which flies at the same time, but rests more like a Skipper with wings partly open.

Recorded in 36 (88%) of 41 10k Squares.
First Recorded in 1887.
Last Recorded in 2023.
Additional Stats

< September Thorn | Lunar Thorn >

List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
17/08/2023120SP91 - Tring
15/08/2023120SP90 - Berkhamsted
09/08/2023120TL23 - Letchworth / Baldock
09/08/2023120TL43 - Meesden / Barley
03/08/2023120TL42 - Bishop's Stortford (N)
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
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VC20 VC21 VC21 VC20
Click Map for Details
Forewing: 14-23mm.
Flight: Two generations Feb-May. July-Sept.
Foodplant:   Blackthorn, Hawthorn, Hazel, Other broadleaved plants
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 1
 Immature Adult   [Show Flight Weeks]
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