The below five point criteria for identifying Copper Underwing Amphipyra pyramidea should be followed, if unsure, choose to agg. the specimen. 1) The underside of the hindwing?s discal area is a pale straw yellow and this contrasts with both the orange-copper terminal area and the blackish-brown curved streak along the leading edge. 2) The cross-line just before the middle of the forewing has four projections along it which are all typically the same length. 3) The upward pointing palps are completely pale 4) The upper parts are brighter and more sharply defined. There is a contrasting broken post median line but a duller and darker brown cross-band towards the trailing edge of the forewing. 5) The copper marking is minimal on the under hind-wing and the black & white colouring of the abdomen sides seems to be more intense.