73.355 Xestia castanea (Neglected Rustic)
fw: 16-18mm; Aug-Sep; heather (Calluna vulgaris), bell heather, cross-leaved heath (Erica cinerea/tetralix); local in heath and moorland throughout GB
ID: Forewing ground colour ranges from light grey-brown to reddish-brown; hindwing grey with whitish to pinkish-grey cilia; markings generally indistinct apart from a black spot in the dorsal half of the kidney mark. X.xanthographa (Square-spot Rustic) can be similar but has the kidney mark pale-outlined and usually entirely paler than the ground colour.
All images © Chris Lewis