Widespread in woodland, scrub, hedgerows, fens, heathland, gardens and parks.
Very similar Svensson's Copper Underwing.
The underside of the hindwing is considered the most, but not totally reliable distinguishing feature.
Underside of hindwings
(Copper & Svensson's)
Other external features are considered subjective and unreliable.
Record as Copper Underwing agg. if unsure.
Verification Grade Comment: Hindwing must be checked or Gen. Det.
Recorded in 64 (93%) of 69 10k Squares.
First Recorded in 1834.
Last Recorded in 2020.