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Spruce Carpet
Thera britannica (Turner H J, 1925)
Geometridae: Larentiinae
1769 / 70.079
Photo © Matthew Casey,  Costessey Sept 2012

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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 2023.

Latest 10 Records
Date#VC10kArea
21/11/2023128TF63Dersingham
21/11/2023127TG04Glandford
16/11/2023127TG10Cringleford (UEA)
10/11/2023127TG20Stoke Holy Cross
04/11/2023128TF63Heacham
03/11/2023128TF92Stibbard
31/10/2023127TG33Ridlington
26/10/2023128TF74Holme NNR
24/10/2023127TG04Glandford
24/10/2023128TF63Heacham
Further info: Thera britannica
 
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