Beetles are present in winter, but they hide and move slowly. Clear signs include dead or sluggish beetles near windows, tiny holes and fine powder from wood, webbing or bugs in pantry foods, and bristly larvae or shed skins in fabrics and rugs.

Key signs you’ll notice

• Clusters of slow beetles at sunny windows or lights (lady beetles/boxelder).
• Tiny dead beetles on sills, around heat registers, or in light fixtures.
• Pin-sized round holes in wood with flour-like powder piles beneath (wood borers).
• Gritty, sand- or sawdust-like “frass” along baseboards, in attics, or under timbers.
• Bristly “worm-like” larvae and shed skins in rugs, closets, or under furniture edges (carpet beetles).
• Webbing and insects in flour, grains, pet/bird food, or spices (pantry pests).
• Faint ticking/clicking in quiet rooms at night from walls or ceilings.
• Beetles emerging on warm winter days, then disappearing again.

Where to check

• Sunny sides of the home: window frames, sliders, and light fixtures.
• Attics, wall voids, basements, crawl spaces, and near insulation.
• Stored fabrics: wool, furs, felt, taxidermy, and under area rugs.
• Pantry shelves and any dry foods; pet/bird seed; bulk spice jars.
• Firewood stacks, damp or leaky areas, and unfinished wood.

What to do now

• Vacuum thoroughly; empty the canister/bag outdoors.
• Launder or dry-clean woolens; hot-dry rugs/throws; freeze small items 72 hours.
• Discard infested foods; store replacements in hard, sealed containers.
• Lower humidity below 50% and ventilate attics/basements.
• Seal cracks, door sweeps, and screens; keep firewood outside until use.
• If fresh wood powder or new holes persist, save samples and contact a licensed pest professional.

The fastest way to get rid of winter beetles is to vacuum visible beetles and clusters, empty the vacuum outside, seal cracks with caulk, reduce indoor moisture, store food and fabrics in sealed containers, set sticky traps, and apply a thin layer of desiccant dust (diatomaceous earth or silica) into cracks where they hide. Identify and remove the food or material they’re using, and keep lights off near entry doors at night.

Quick Actions That Work Right Now

• Vacuum beetles, window frames, and baseboards; bag and discard contents outdoors.
• Seal gaps around doors, windows, attic access, pipe and cable penetrations with silicone or acrylic-latex caulk; add door sweeps and weatherstripping.
• Dry the space: run dehumidifiers and fix leaks; most beetles avoid dry areas.
• Food security: place grains, flour, pet food, and birdseed in airtight containers; discard infested items.
• Fabrics: wash wool, feathers, and furs hot or dry-clean; or freeze sealed items for several days to kill eggs and larvae.
• Dusts: puff a light film of diatomaceous earth or silica into wall voids, outlet perimeters, baseboard gaps, and attic eaves; keep away from pets’ bowls and avoid inhaling.
• Traps: use sticky traps near windows and pantry pheromone traps labeled for pantry beetles; replace as they fill.
• Lighting: reduce night lighting at doors and windows; use yellow “bug” bulbs outdoors.
• Firewood: store outside; bring in only what you burn immediately.

Targeted Tips by Common Winter Invaders

• Lady beetles and stink beetles: vacuum clusters, seal attic and soffit gaps, light traps in dark rooms at night.
• Carpet beetles: deep-clean lint and dust, especially under furniture and along edges; treat cracks with desiccant dust.
• Pantry beetles: discard infested packages, clean shelves, and trap; heat or freeze suspect foods.