Geometridae : Geometrinae
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Photo © Neil Sherman,  Purdis Farm, Ipswich. July 2019

Immature stages

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Similar Suffolk Species: None
Grass Emerald
Pseudoterpna pruinata

(Walker, 1863) 1665 / 70.297

Morley's Final Catalogue: Considered to be too 'widely distributed' to localise in 1890. It may be so, but no later records have come in, excepting its occasional occurrence at electric lights in Ipswich during July, and quite rarely at lamps in Monks Soham. None seem noticed on our broad heathlands during recent years.

Recent Suffolk Status: Local on heaths in the Brecks and Sandlings.

Life history: Single brooded in the summer. Comes to light and can be disturbed from the foodplants during the day.
Larvae overwinter partially grown and have been found in the county in late spring.

Identification: The bluish green colouration distinguishes this species from other emeralds.

Habitat: Mainly heathland and other sandy habitats where Broom and Gorse is found.

Recorded in 23 (40%) of 58 10k Squares.
First Recorded in 1940.
Last Recorded in 2023.
Additional Stats

< Rest Harrow | Large Emerald >

List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
24/08/2023+26TL78 - Brandon/Lakenheath
15/08/2023125TM24 - Woodbridge/Martlesham
13/08/2023125TM25 - Wickham Market/Otley
09/08/2023125TM24 - Woodbridge/Martlesham
09/08/2023125TM24 - Woodbridge/Martlesham
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
Express Record Grass Emerald
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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Forewing: 14-19mm.
Flight: One generation. June-Aug. (Sept-Oct)
Foodplant:   Gorse, Broom, Petty Whin
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 1
 Immature Adult   [Show Flight Times]
Underlying maps using Digital Map Data © Norfolk Online Lepidoptera Archive - NOLA™ - Suffolk 2024. © James Wheeler - Norfolk Moths 2007 - 2024. Data © NOLA™ - Suffolk 2024
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