Bird's Wing.
(Dypterygia scabriuscula)

A rarity in Gloucestershire - can be found in very local patches in Wales and England.

Information:
Dark chocolate brown background colour with distinctive two-tone lighter brown marking that looks a bit like the plan view of a bird flying with wings and neck outstretched.
Fore-wing length: 16mm. They normally fly May-July and can be seen over broadleaved woodland, heaths, parks and areas of scrubland.