Click Beetle

Click beetles make up the family Elateridae, a large and widespread group named for their signature defensive trick: when flipped onto their back, they arch and suddenly snap a spine-and-notch mechanism between the thorax and abdomen, launching themselves into the air with an audible click and often landing right-side up. This spring-loaded jump is one of the most distinctive behaviors in the beetle world.

Adult click beetles are elongated and somewhat flattened, typically brown, black, or gray, with a streamlined shape built for slipping under bark and into soil crevices. Their larvae, known as wireworms, are hard, shiny, and worm-like, living underground where they feed on plant roots and organic matter.

The family includes several visually striking members, such as the eyed click beetle with its large false eyespots on the thorax, and glowing click beetles found in tropical regions whose bioluminescent spots make them stand out after dark.

• Elongated, narrow, somewhat flattened body tapering at both ends, usually brown, black, or gray, sometimes with mottled patterning.
• A distinct backward-pointing spine on the underside of the thorax fits into a matching notch, powering the signature clicking-jump escape mechanism.
• Thread-like to slightly serrated (saw-toothed) antennae; legs are short and used mainly for walking rather than jumping.
• Some species, like the eyed click beetle, display large false eyespots on the pronotum to startle predators.
• Lookalikes include other elongated beetles, but the ability to snap and flip when placed on its back is unique to this family and the easiest confirmation in hand.

Click beetles are found worldwide, especially in temperate and tropical regions, inhabiting gardens, meadows, agricultural fields, and woodland edges. Adults are most active from late spring through summer, often found on foliage, tree bark, or flying at dusk toward lights. Larvae (wireworms) live underground in soil, decaying wood, or leaf litter, where they remain hidden from view for most of their long developmental period.

Adult click beetles feed lightly on nectar, pollen, or plant tissue, though many adults feed very little and focus mainly on reproduction. Their most notable behavior is the clicking self-righting mechanism, used both to escape predators when flipped onto their back and as a startling defensive snap. Larvae are subterranean and feed on plant roots, decaying wood, or occasionally other small soil invertebrates, playing a role as both plant-tissue consumers and prey within soil food webs.

Females lay eggs in soil or leaf litter, and the larvae that hatch, known as wireworms, are slender, hard-bodied, and shiny, living underground for an extended period, in some species up to several years, as they feed and grow through complete metamorphosis. When fully developed, the larva forms a pupal chamber in the soil before emerging as a winged adult, typically in spring or summer. Most species produce one generation over one to several years depending on soil temperature and food availability, and larvae overwinter underground below the frost line.