Donacaula mucronella

Donacaula mucronella is a species of moth of the family Crambidae. It is found in Europe.

The wingspan is 22–26 mm for the male and 29–35 mm for females.The forewings are brown; an ochreous- whitish costal streak, edged below with dark fuscous suffusion. Hindwings fuscous-whitish.

The moth flies from June to September depending on the location.

The larvae feed on Carex, Carex riparia, Glyceria maxima and Phragmites.