Driftless Prairies: Native Habitat Restoration

Nature inspires awe!

Elmidae (Riffle Beetles)

Riffle beetles are aquatic with their choice being shallow, moving fresh water. Most live in the rocky, gravelly substrate, but some live among the roots or in waterlogged wood. They eat detritus and decaying plant material.

Some species overwinter as larvae. Most species will overwinter as larvae and adults in the same habitat and eating the same foods.

Eggs are placed in crevices either singly or in small groups. When the larvae is ready to pupate, they crawl out of the water or wait until the water recedes, leaving them on a shoreline. Once they pupate, the adults might fly at night before they enter the water where they remain for the rest of their lives. Adults are long lived.