Obscure Wainscot Leucania obsoleta
Wingspan 36-40 mm.
A rather local species, but with a scattered distribution in parts of England and Wales, occupying marshes and fenland.
The adults fly from May to July, and are attracted to light.
The dull, brownish caterpillars feed nocturnally on the stems of common reed (Phragmites australis), hiding internally in the stems during the day.