Geometridae : Larentiinae
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Photo © Ben Sale,  Plashes Wood, Hertfordshire (21/12/18) - Female

Similar Herts & Middlesex Species
Northern Winter Moth
Operophtera fagata
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Winter Moth
Operophtera brumata

(Linnaeus, 1758) 1799 / 70.106

General comments:
Widespread resident.

Likely to be present in every map tetrad. It often easily found by using a torch to look for freshly emerged females on tree trunks (usually oaks and usually in woodland), at around 7pm in November/December. At this hour, the winged males may intercept the flightless females at around human head height as they walk up the tree trunk from the ground beneath. Vertical progress by the females will vary with season etc., so the time should not be taken too literally. From January onwards, confusion of males is possible with the Early Moth (Theria primaria) - moths should be caught and examined - not named from afar.

Recorded in 36 (88%) of 41 10k Squares.
First Recorded in 1020.
Last Recorded in 2023.
Additional Stats

< Northern Winter Moth | November Moth >

List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
29/12/202370020TL42 - Bishop's Stortford (N)
29/12/2023120TL31 - Hertford
27/12/2023120TL31 - Hertford
26/12/2023120TL31 - Hertford
25/12/2023321TQ09 - Watford / Rickmansworth
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record Winter Moth
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VC20 VC21 VC21 VC20
Click Map for Details
Forewing: 13-16mm.
Flight: one generation Oct-Jan.
Foodplant:   Broadleaved trees
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 2
 Immature Adult   [Show Flight Weeks]
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