Many snails have a diet of plant stems and leaves. The firefly plays the role of the natural enemy of the snail and controls the numbers of spiral-shelled pests. It is thus seen as a "beneficial insect" by farmers.
由於許多蝸牛以植物莖、葉為食，螢火蟲扮演著蝸牛天敵、控制螺貝類數量的角色，被農民視為「益蟲」。