Very rare immigrant (less than 10 previous UK records) from northern Europe. New to Britain in 2010, when an individual was caught at light in Bernwood Forest, Buckinghamshire on 4 June. A fairly widespread species in central and northern Europe, with the Netherlands being the closest country of residence to our island, and across Scandinavia. Not recorded in Hampshire or on the Isle of Wight to date. Very similar in appearance to C. illutana and dissection will be required for confirmed determination. The larvae are known to feed under the bark of Norway Spruce Picea abies, with a continental flight-period of late May to early July.

Flightime guide
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