Brachionycha nubeculosa, the Rannoch sprawler, is a moth of the family Noctuoidea.

It is found across the Palearctic from the British Isles in the west, across central and northern Europe over Russia, Siberia to China.

Edward Meyrick describes it thus: Forewings pale brownish mixed with whitish and much sprinkled with black; veins marked with blackish; first, median, and second lines dark fuscous; reniform whitish, black edged, enclosing two dark marks; claviform, oval, black edged.

The larva habitually rests with the anterior segments strongly thrown back over the body and the legs outspread.

[1] The moth flies from March to April.a The larvae feed on birch, willow, Populus tremula, Prunus padus, Lonicera xylosteum, Tilia, Rhamnus frangula and Aster species.