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Light Orange Underwing
Archiearis notha (Hübner, 1803)
Geometridae: Archiearinae
1662 / 70.204
Photo © Garry Barlow,  Oversley Wood

Similar West Midlands Species
Orange Underwing
Archiearis parthenias
Forewing: 15-17mm
Flight: March - April
Foodplant:   Aspen
Red List: Least Concern (LC)
GB status: Nationally Scarce
Former Status: Nationally Scarce B
Verification Grade:  Adult: 3

An uncommon and local resident in the south. Recently recorded in Staffordshire at Bushbury.

A species of open woodland containing Aspen.

Overwinters as a pupa. Adults fly above Aspens in the sunshine.

Note This species is very similar to Orange Underwing but lack of Aspen should help to eliminate that species. The underside of the hind wing should be examined. This species has an unbroken dark band around the margin, not or only slightly indented. On Orange Underwing this band is broken or strongly indented.

(Note 2021 genus name change to Archiearis)

Retained Specimen / Photograph will be Required.

Recorded in 24 (17%) of 140 10k Squares.
First Recorded in 1869.
Last Recorded in 2022.
(Data up to end 2022)

Latest 5 Records (Data up to end 2022)
Date#VC10k Area
20/04/2022137SO95 - Upton Snodsbury
11/04/2022337SO86 - Droitwich Spa
11/04/2022337SO86 - Droitwich Spa
11/04/2022237SO95 - Upton Snodsbury
10/04/2022137SP08 - Harborne
Further info: Archiearis notha
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