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Spruce Carpet
Thera britannica (Turner H J, 1925)
Geometridae: Larentiinae
1769 / 70.079
Photo © Martin Rejzek,  21/09/2022 - Thorpe Hamlet, Norwich

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Similar Species
Grey Pine Carpet
Thera obeliscata
Forewing: 13-17mm
Flight: Two Generations
May-July, Sept-Nov.
Foodplant:   Norway Spruce, Sitka Spruce, Western Hemlock
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 2
Status
Spruce plantations other coniferous woodland, heathland, grassland and gardens.
Can be hard to distinguish from Grey Pine Carpet, but is usually bolder and greyer in appearance, appearing more variegated with the median band more fluted and normally edged narrowly with white.

Found throughout the British Isles, less common in Scotland and Ireland. Adult moths fly in two generations and come to light often in large numbers. The larvae feed on many coniferous trees, but mainly Norway Spruce, Sitka Spruce and Western Hemlock, but also Scots Pine, Douglas Fir and Lawson's Cypress.

Recorded in 61 (82%) of 74 10k Squares.
First Recorded in 1940.
Last Recorded in 2024.
Additional Stats

Latest 10 Records
Date#VC10kArea
13/10/2024127TG23North Walsham
07/10/2024128TL79Mundford
07/10/2024127TG30Blofield / Lingwood
07/10/2024328TM09Great Ellingham
07/10/2024627TG14Felbrigg / Runton
07/10/2024127TG03Briston
07/10/2024127TG23North Walsham
06/10/2024227TG14Felbrigg / Runton
06/10/2024228TF62King's Lynn
02/10/2024127TG11Horsford
Further info: Thera britannica
 
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