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Light Orange Underwing
Archiearis notha (Hübner, 1803)
Geometridae: Archiearinae
1662 / 70.204
Photo © Neil Bowman,  Norfolk April 2021

Similar Norfolk Species
Orange Underwing
Archiearis parthenias
Forewing: 15-17mm.
Flight: March - April.
Foodplant:   Aspen.
Nat Status: Nationally Scarce B
Verification Grade:  Adult: 3
Norfolk Status
Occurring locally in the southern half of England.

Known from one site in Norfolk (confirmed in 2021), where they were first seen in 2018.

Identification can be made by differences in the male antennae, which are finely serrated in Orange Underwing and slightly feathered in Light Orange Underwing.
The underside of the hindwing of Orange Underwing shows an orange band that projects centrally into a dark outer band, often reaching outer margin. Light Orange Underwing shows a dark outer band that is is unbroken, and the central projection of the orange band is absent. (MBGBI Vol 7 part 2)

Barrett [VCH 1901] Brephos notha, Hb.
" Has been taken at Horsford near Norwich"

Retained Specimen / Photograph will be Required.

Recorded in 3 (4%) of 69 10k Squares.
First Recorded in 1873.
Last Recorded in 2021.

Latest 5 Records
Date#VC10k Area
1914+28TF60 - Downham/Fincham
1907128TF60 - Downham/Fincham
1873 to 1913+27TG11 - Drayton/Swannington
Further info: Archiearis notha
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