Notodontidae : Thaumetopoeinae
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Photo © Clive Ireland,  21/08/2023 - Mill Street, Westleton

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Similar Suffolk Species
Pine Processionary
Thaumetopoea pityocampa
Pale Eggar
Trichiura crataegi
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Oak Processionary
Thaumetopoea processionea

(Linnaeus, 1758) 2022 / 71.001

Morley's Final Catalogue: Not noted from Suffolk in Morley's time.

Recent Suffolk Status: Formerly a rare immigrant but in more recent years becoming almost annual, sometimes in numbers, most likely due to the big increase in the naturalized population around London. Could become resident like it has done in parts of Essex.
The first county record was in Felixstowe on 03.08.1995 (A. Watchman). This was quickly followed by 3 more records: 04.08.1995 at Landguard (N. Odin), 11.08.1995 at Felixstowe (J. Nichols) and finally on 11.08.1995 at Shottisham (A. Watchman 1995 was a good year for moth migration and this species was noted at many sites across the country. There are only odd single records up until 2018 when numbers suddenly started to increase. 2020 is the year with most records currently (45).

Life history: Single brooded the summer. Larvae live in communal nests on Oaks and leave together nose to tail, hence the species English name.
A notifiable species, any suspected larval nests or caterpillars in the county please report to via TreeAlert.
(authorities do not require reports of adult moths)

Identification: The pale basal area of the forewing distinguishes this species from Pine processionary.

Habitats: Woodland, gardens, parks, coastal habitats.

Retained Specimen / Photograph will be Required.

Recorded in 28 (48%) of 58 10k Squares.
First Recorded in 1995.
Last Recorded in 2023.
Additional Stats

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List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
23/08/2023125TM13 - Brantham/Holbrook
21/08/2023125TM46 - Minsmere/Leiston
21/08/2023125TM46 - Minsmere/Leiston
15/08/2023125TM24 - Woodbridge/Martlesham
15/08/2023125TM27 - Fressingfield/Stradbroke
Show Details | 1990 to 2022 | 2000 to 2022 | Graph Key
Express Record Oak Processionary
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Copyright © Jim Wheeler 2023

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Forewing: 16-17mm (f), 14-16mm (m)
Flight: July - September
Foodplant:   Oaks
GB Status: Naturalised / Immigrant
Former Status: Immigrant
Verification Grade:  Adult: 3
 Immature Adult
Underlying maps using Digital Map Data © Norfolk Online Lepidoptera Archive - NOLA™ - Suffolk 2023. © James Wheeler - Norfolk Moths 2007 - 2023. Data © NOLA™ - Suffolk 2023
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