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White-spotted Pinion
Cosmia diffinis (Linnaeus, 1767)
Noctuidae: Xyleninae
2317 / 73.214
Photo © Ron Forrester,  Icklingham. July 2021.

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Similar Species
Lesser-spotted Pinion
Cosmia affinis
Lunar-spotted Pinion
Cosmia pyralina
Forewing: 14-16mm.
Flight: One gen. late July- late Aug.
Foodplant:   English Elm, Wych Elm, Small-leaved Elm.
Red List: Least Concern (LC)
GB Status: Nationally Scarce
Former Status: Red Data Book (proposed)
Verification Grade:  Adult: 3
Morley's Final Catalogue: Distinctly scarce, and known from only Bentley, Brandeston, Needham, Stowmarket, Bury, Ickworth; and Beccles. Henham in August 1924 (Mr).

Recent Suffolk Status: Suffered a massive decline nationally in the 1970s following the outbreak of Dutch Elm disease. Last record in the county at that time was in 1968. Thought to be extinct. Unexpectedly reappeared in 2021 in the west of the county, with more records in 2022 and 2023 suggesting the species may be attempting to recolonise the county from Cambridgeshire where it has been increasing.

Life history: Single-brooded. Larvae feed on epicormic growth on Elm trees. Recent larval searches in Suffolk have been negative so far.

Identification: The large white patches along the costa should separate this species from the other pinions.

Habitat: Hedgerows with Elms, woodland.

Verification Grade Comment: Very rare.

Retained Specimen / Photograph will be Required.

Recorded in 5 (9%) of 58 10k Squares.
First Recorded in 1924.
Last Recorded in 2023.
Additional Stats

Latest 10 Records
11/08/1968125TM05Stowmarket/Needham Market
08/08/1963125TM05Stowmarket/Needham Market
Further info: Cosmia diffinis
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