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Light Crimson Underwing
Catocala promissa ([Denis & Schiffermüller], 1775)
Erebidae: Erebinae
2454 / 72.082
Photo © John Mann,  21/07/2023 - Heacham

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Similar Species
Dark Crimson Underwing
Catocala sponsa
Red Underwing
Catocala nupta
Forewing: 26-32mm.
Flight: July - September
Foodplant:   Pedunculate Oak, possible Sessile Oak
Red List: Near Threatened (NT)
GB Status: Nationally Rare
Former Status: Red Data Book
Verification Grade:  Adult: 3
Uncertain/Rare migrant.
Formerly confined to large Oak woodland in the New Forest, increasing its range in SE England in recent years.

Similar to Dark Crimson Underwing. DCU is usually larger and brown in general colouration, LCU is smaller and greyer. The hindwing upperside is the most reliable feature to separate. DCU black cross-bar deeply waved. LCU black cross-bar much straighter with shallow waves. See field guides for more info.

First modern-day records at Hunstanton in 2022 (R. Sturgess, 05/08/22) and at Heacham in 2023 (J. Mann, 21/07/23) Both taken in areas of old Oak trees.
Specimen also taken at Cley NNR in 2023 (D. Norgate et. al.,01/08/23)

Documented record from Norwich in 1993 is not valid. Specimen was dead, and is thought travelled to Norwich from the New Forest in someone's car!

Barrett [VCH 1901] Catocala promissa, Sch.
" Foxley, Foulsham, and once at Hethersett; an exceedingly local species"

BAP Priority Species

Retained Specimen / Photograph will be Required.

Recorded in 5 (7%) of 74 10k Squares.
First Recorded in 1873.
Last Recorded in 2023.
Additional Stats

Latest 10 Records
01/08/2023127TG04Cley next the Sea
Further info: Catocala promissa
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