What Does a Beetle Eat?

Plant Parts Consumed

Beetles like weevils, cottonwood leaf beetles, elm leaf beetles, and certain long horned beetles consume roots, stems, leaves, seeds, nectar, and fruits.

Aquatic Herbivores

Beetles in wet environments or aquatic habitats might feed on algae and swamp land detritus.

Agricultural Pests

Species like rice weevils target crops, making them a significant concern for farmers. They cause discoloration and plant death.

Ground Beetles

Carnivores that prey on soft-bodied insects like maggots, worms, snails, grubs, and slugs.

Tiger Beetles

Use their speed to chase down prey and large mandibles to attack. Can catch prey mid-air while flying.

Lady Beetles

Beneficial to farmers. Both larvae and adults eat pests like caterpillars, aphids, scale insects, and mites.

Diving Beetles

Aquatic predators that prey on water bugs, small amphibians, tadpoles, and even small snakes.

Hide Beetles

Scavenge dead carrion and bury eggs in food for larvae

Carrion Beetles

Evolved to consume decaying plants and dead animals

Clown Beetles

Feed on decaying organic matter in various environments

Scarab Beetles

Consume decaying matter from plants to dead animals

Fungus-Eating Beetles

Mildew beetles primarily consume fungi found in damp, moist environments. They are often found in high humidity areas like bathrooms and laundry rooms where fungi thrive.

Dung Beetles

Primarily feed on animal feces. They have a keen sense of smell to locate fresh feces, then inhabit it directly or store it in underground chambers. This behavior (coprophagy) provides essential nutrients. They selectively target nitrogen-rich particles for protein synthesis.

Wood-Boring Beetles

Powder post beetles and long horned beetles cause significant structural damage to buildings by targeting wooden supports, subfloors, decorative pieces, and furniture. They feed on untreated lumber.

Carpet Beetles

Larvae feed on organic carpet fibers, but also consume clothing, linens, bedding, curtains, and upholstery. The prolonged larval stage (up to 3 years) combined with dozens of eggs makes them destructive.

Store susceptible foods (flour, grains, nuts) in airtight containers

Clean up crumbs and wipe down surfaces after meals

Vacuum carpets thoroughly to eliminate pet hair and fibers

Replace or repair decaying wood elements like trimmings or flooring

Seal gaps, holes, or cracks around doors and windows

Inspect items for beetles before bringing them into your home