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Spruce Carpet
Thera britannica (Turner H J, 1925)
Geometridae: Larentiinae
1769 / 70.079
Photo © Stephen Youngs

Similar Norfolk Species
Grey Pine Carpet
Thera obeliscata
Forewing: 13-17mm
Season: Two Generations
May-July, Sept-Nov.
Foodplant:   Norway Spruce, Sitka Spruce, Western Hemlock
Nat Status: Common
Verification Grade:  Adult: 2
Norfolk Status
Spruce plantations other coniferous woodland, heathland, grassland and gardens.
Can be hard to distinguish from Grey Pine Carpet, but is usually a bolder, better
marked insect and generally greyer in appearance than Grey Pine. Normally appears 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 60 (87%) of 69 10k Squares.
First Recorded in 1940.
Last Recorded in 2019.

Latest 5 Records
Date#VC10k Area
05/11/2019127TG10 - Wymondham/Cringleford
01/11/2019128TF81 - Castle Acre/Litcham
01/11/2019128TF83 - N.Creake/Syderstone
01/11/2019127TG04 - Blakeney/Cley
01/11/2019227TG11 - Drayton/Swannington
Further info: Thera britannica
UK Moths
Mothdissection UK
Suffolk Moths
Hants Moths Norfolk Moths (Full)
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