The two Copper Underwings are tricky to identify. The safest way is to examine the underside of the hindwing. This is not easy on live specimens but unless it is done then records of the two have to be grouped under this aggregate.

Recorded in 91 (65%) of 140 10k Squares.
First Recorded in 1926.
Last Recorded in 2022.
(Data up to end 2022)