Types of Beetles in Tennessee: Identification Guide
Beetles in Tennessee: Quick Facts
Beetles are the largest group of insects on earth, and a handful regularly cause trouble in Tennessee homes. Some eat fabrics, some infest pantry food, some bore into wood, and some simply wander in from outdoors. Where you find the beetle is usually the best clue to what it is.- In closets, rugs, or near windows: Probably carpet beetles
- In the pantry: Probably cigarette beetles, drugstore beetles, or other pantry pests
- Tiny holes and powder in wood: Probably powderpost beetles or old house borers
- Clusters on sunny walls in fall: Probably Asian lady beetles
- Large black beetles on floors: Usually ground beetles wandering in from outside
Common Household Beetles
Fabric Pests
Carpet beetles are small, round, often mottled beetles whose hairy larvae eat wool, silk, fur, feathers, and pet hair. They’re one of the most common beetles indoors. See our carpet beetle guide.
Pantry Pests
Cigarette beetles, drugstore beetles, and grain beetles infest flour, spices, cereal, pet food, and other dry goods. See our cigarette beetle guide and weevil and pantry pest guide.
Wood-Boring Beetles
Powderpost beetles and old house borers tunnel through wood as larvae, leaving small holes and powder behind. See our powderpost beetle guide and old house borer guide.
Lady Beetles
Asian lady beetles gather on sunny walls in fall and move into homes to spend the winter. See our lady beetle guide.
Outdoor Beetles That Wander In
Ground beetles, darkling beetles, and other shiny black or dark beetles live outdoors under mulch, leaves, and stones. They sometimes wander inside, especially in fall or after heavy rain, but they don’t breed indoors or damage anything. Japanese beetles and June beetles are garden and lawn pests whose grubs feed on grass roots.
How to Identify a Beetle
- Hard wing covers: Beetles have hardened front wings that meet in a straight line down the back.
- Size and shape: Note whether it’s tiny and round, long and narrow, or large and flat.
- Location: Closets, pantries, wood, windows, and floors each point to different beetles.
- Larvae: Hairy larvae in closets point to carpet beetles; small grubs in food point to pantry beetles.
Signs of a Beetle Problem
- Damaged fabrics: Irregular holes in wool clothing, rugs, or upholstery
- Shed skins: Tiny, bristly larval skins in closets and drawers
- Infested food: Small beetles, holes, or webbing in flour, spices, or pet food
- Holes in wood: Small round holes with fine powder beneath
- Beetles at windows: Carpet beetles and pantry beetles are attracted to light
How to Prevent Beetles
- Vacuum thoroughly: Especially under furniture, along baseboards, and in closets.
- Store food in sealed containers: Glass, metal, or thick plastic.
- Store clothing clean: Wash or dry clean wool before storing it in sealed bins.
- Seal gaps: Caulk around windows, doors, and siding to keep outdoor beetles out.
- Remove old nests: Bird and wasp nests in attics can feed carpet beetles.
- Control moisture: Damp wood attracts wood-boring beetles; see crawl space encapsulation.
When to Call a Professional
Call if beetles keep returning, you’re finding damaged fabrics or wood, or you can’t find the source. A technician will identify the beetle and treat the source, not just the adults you see. See our beetle control services.
Frequently Asked Questions
What are the tiny beetles in my house?
Small, round beetles near windows or in closets are often carpet beetles. Small brown beetles in the pantry are usually cigarette or drugstore beetles.
Why are there black beetles on my floor?
They’re usually ground beetles or other outdoor beetles that wandered in. They don’t breed indoors or cause damage.
Are household beetles harmful?
Most aren’t dangerous to people. Carpet beetles damage fabrics, pantry beetles ruin food, and wood-boring beetles damage wood.
How do I get rid of carpet beetles?
Vacuum thoroughly, wash or dry clean infested items, store clothing in sealed containers, and remove the larvae’s food sources.
Why do I have beetles in my pantry?
Pantry beetles usually arrive in infested packages and spread to other dry goods. Find and discard infested items and store food in sealed containers.
