August Thorn Moth Ennomos quercinaria

August Thorn moth August Thorn male with feathered antennae and orange legs.
August Thorn moth Batwoman.
Thanks to Martin Starnes for these photos of the August Thorn moth, native to much of the UK and Europe, flying in August and September in northern Europe.
August Thorn moth The typical August Thorn generally looks paler - the camera flash makes it "Feathered Thorn" brick orange rather than pale oak.
August Thorn moth This spotted version has a slightly different pattern of lines, but the top line curves round and the wing edges are scalloped.
Its wingspan is 45-50mm. While these two pictures look very different, the August Thorn itself looks similar several other thorns, eg. Cloudy August Thorn, September Thorn, Canary-shouldered Thorn (but redder hair rather than canary yellow).
August Thorn moth
August Thorn moth
Caterpillars feed on trees such as oak (Quercus) and beech.