Eurygaster maura, commonly known as the cereal bug or the sunn pest, is an insect belonging to the family Scutelleridae. It is a medium-sized insect, measuring around 10-12 mm in length, with a distinct shield-shaped body. Eurygaster maura is a major pest of cereal crops, particularly wheat and barley, causing significant damage by feeding on the developing grains. It is widely distributed in Europe, Asia, and North Africa.