Soldier Beetle Beneficial Insect

Soldier beetle

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The soldier beetle is a beneficial insect. A second common name for the soldier beetle is leatherwings.

Both adult and especially larvae soldier beetles are voracious eaters preying on insect pests including cucumber beetles, corn rootworms, aphids, grasshopper eggs, caterpillars, and beetle larvae.

Soldier beetles are found throughout North America. There are numerous species.

Soldier beetles belong to the scientific family Cantharidae.

Soldier beetle
Soldier beetle

How to identify the soldier beetle

An adult soldier beetle is an elongated, slender, nearly flat beetle ⅓ to ½ inches long.

Soldier beetles often have leathery-looking wing covers—thus the name leatherwings. (One of the first species of soldier beetle described had a color pattern reminiscent of the red coats of early British soldiers, hence the common name soldier beetle.)

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Soldier beetle life cycle

Adult soldier beetles typically feed and mate on flowers. The female lays eggs in clusters in the soil. Eggs hatch in about ten days.  The tiny larvae are white-colored and display little or no activity until the first molt.

With each successive molt, the larvae darken until they become velvety black. And with each molt, the larvae become more active. Soldier beetle larvae feed on a multitude of soft-bodied insects until winter. They overwinter in the soil and pupate in the spring before emerging. There are up to two generations each year.

How to attract soldier beetles to the garden

Attract soldier beetles to the garden by planting goldenrod, milkweed, hydrangeas, and catnip. Soldier beetles will feed for nectar and lay eggs on these plants.

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Written by Stephen Albert

Stephen Albert is a horticulturist, master gardener, and certified nurseryman who has taught at the University of California for more than 25 years. He holds graduate degrees from the University of California and the University of Iowa. His books include Vegetable Garden Grower’s Guide, Vegetable Garden Almanac & Planner, Tomato Grower’s Answer Book, and Kitchen Garden Grower’s Guide. His Vegetable Garden Grower’s Masterclass is available online. has more than 10 million visitors each year.

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