Soldier Beetles: Pollinators and Predators You Want in Your Garden

Soldier beetles (family Cantharidae), also called leatherwings, are often mistaken for fireflies (without the glow) or wasps. Their soft, elongated bodies—typically yellowish-tan with a black spot on each wing cover—are a common sight on late-summer flowers. Far from pests, they are dual-role benefactors: larvae eat pest eggs and soft-bodied insects in soil; adults pollinate widely while feeding on nectar and pollen.

Life Cycle and Benefits

Eggs laid in fall hatch into predatory larvae that overwinter in soil and leaf litter. In spring, they emerge as adults and flock to bright flowers—especially goldenrod, zinnias, marigolds, and flowering herbs. They cannot bite or sting humans. Their constant flower-to-flower movement makes them excellent pollinators, rivaling bees in some settings. Late summer, they help suppress aphid outbreaks just as other predators decline.

Attracting Soldier Beetles

Plant their favorites: goldenrod (top choice), linden trees, and a succession of open, accessible flowers. Allow herbs (dill, fennel, cilantro) to bloom. Avoid insecticides. Provide undisturbed soil and leaf litter for larval development and overwintering.

Soldier beetles are a sign of a healthy, flower-rich ecosystem—welcome them and enjoy the pollination bonus.