Photo © Andy Mitchell
Leucania obsoleta, the obscure wainscot, is a moth of the superfamily Noctuoidea. The species was first described by Jacob Hübner in 1803. It is found in Europe.
The length of the forewings is 15–18 mm. The moth flies in one generation from early May to late July.
The larvae feed on Phragmites species.
Source: Wikipedia
The primary larval foodplant is Common Reed (Phragmites australis).