Donacaula mucronella is a species of moth of the family Crambidae. It is found in Europe.
The wingspan is 22âÂÂ26 mm for the male and 29âÂÂ35 mm for females. The forewings are brown; an ochreous- whitish costal streak, edged below with dark fuscous suffusion. Hindwings fuscous-whitish. See also Parsons et al.
The moth flies from June to September depending on the location.
The larvae feed on Carex, Carex riparia, Glyceria maxima and Phragmites.