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Orange Underwing
Archiearis parthenias (Linnaeus, 1761)
Geometridae: Archiearinae
1661 / 70.203
Photo © Andy Musgrove

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Light Orange Underwing
Archiearis notha
Forewing: 16-19mm.
Flight: One generation. Mar-April.
Foodplant:   Downy Birch, Silver Birch.
Red List: Least Concern (LC)
GB Status: Common
Former Status: Local
Verification Grade:  Adult: 1
Status
Local in Birch heathland and woodland.

Day-flying species best seen on warm, sunny spring days, usually seen flying high around the tops of Birch trees before they come into leaf.

Recorded in 38 (51%) of 74 10k Squares.
First Recorded in 1873.
Last Recorded in 2025.
Additional Stats

Latest 10 Records
Date#VC10kArea
09/03/2025227TG21Horsford / Hainford
08/03/2025228TL88West Tofts Heath
07/03/2025128TL79Didlington
06/04/2024128TF62Dersingham Bog
02/04/2024127TG12Buxton Heath
02/04/2024128TF62Sandringham
02/04/2024228TL79Didlington
01/04/2024127TG04Salthouse Heath
31/03/2024128TL88Santon Downham / Grimes Graves
18/03/2024128TF62Sandringham
Further info: Archiearis parthenias
 
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