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Spruce Carpet
Thera britannica (Turner H J, 1925)
Geometridae: Larentiinae
1769 / 70.079
Photo © Lynnette Nicholson, Mark Golley,  01/05/2023 - Cley

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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.

Latest 10 Records
Date#VC10kArea
17/05/2024128TL79Mundford
17/05/2024127TG11Costessey
15/05/2024128TF92Brisley
14/05/2024128TF51Walpole Highway
13/05/2024228TF51Walpole Highway
13/05/2024127TG11Taverham
13/05/2024127TG14Felbrigg / Runton
13/05/2024128TF62King's Lynn
13/05/2024127TG41Filby
12/05/2024128TF62King's Lynn
Further info: Thera britannica
 
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