Small Wainscot Denticucullus pygmina
Wingspan 23-29 mm.
This species varies somewhat in ground colour, with specimens ranging from pale buff to deep reddish-brown.
Fairly common throughout Britain, it is to be found in marshy areas, wet heathland and other damp localities.
The adults fly in August and September, and the larvae feed internally in the stems of sedges (Carex spp.).