Record the clue before interpreting it
Photograph from above and side with scale. Record movement, hairs, case material and the exact item or substrate.
A useful record includes scale, shape, texture, placement and whether the material returns after a clean baseline is established. Avoid changing the scene merely to make identification easier.
What to note
- Hairy versus smooth body
- Dark head capsule
- Legs or no visible legs
- Food, textile, drain or wood source
Do not spray food, clothing or plant media without a label-specific method. Isolate the source first.
Read the full safety guideCommon candidates
These candidates are not ranked until location, scale, pattern, context and timing are added. Open a profile to see confirming and contradicting evidence.
Varied carpet beetle
Anthrenus verbasci
Hairy banded larval skins and irregular grazing damage in lint, wool, feathers or stored natural fibers.
Clothes moth
Tineola bisselliella and Tinea pellionella
Smooth pale larvae, attached silk cases or webbing and clipped natural fibers in dark garment folds.
Indianmeal moth
Plodia interpunctella
Silk-clumped food, webbing in package seams and a two-tone adult moth in kitchens or pantries.
Rice weevil
Sitophilus oryzae
Tiny dark beetles with a clear snout and round emergence holes in whole grain or seed.
Drugstore beetle
Stegobium paniceum
Hump-backed brown adults, small package pinholes and fine product dust without obvious silk.
Drain fly
Psychodidae
Fuzzy triangular wings, weak short flight and adults resting near one persistent wet-film source.
Fruit fly
Drosophilidae
Compact tan flies hovering actively around fermenting fruit, beverage residue or recycling.
Fungus gnat
Sciaridae
Long-legged dark gnats hovering close to moist plant soil, with translucent dark-headed larvae in media.
Powderpost beetle
Lyctinae and related groups
Tiny round holes with flour-like powder accumulating below unfinished or stored wood.
Old house borer
Hylotrupes bajulus
Larger oval exit holes, coarse packed frass and feeding sounds in softwood framing.
Comparisons that resolve common confusion
Side-by-side decision
Powderpost beetle vs. old house borer
Exit-hole diameter and frass texture are decisive: powderpost signs are tiny and flour-like; old-house-borer signs are larger and coarser.
Open comparison
Side-by-side decision
Termite pellets vs. powderpost beetle dust
Termite frass remains distinct pellets; powderpost frass behaves like fine flour around tiny round exits.
Open comparison
Side-by-side decision
Bed bug vs. carpet beetle cast skins
Bed-bug skins preserve a flat insect outline with legs; carpet-beetle skins are hairy and often banded.
Open comparison
Side-by-side decision
Carpet beetle vs. clothes moth damage
Carpet beetles leave hairy skins; clothes moths leave attached silk, tubes or cases.
Open comparison
Side-by-side decision
Clothes moth vs. pantry moth
The food source is decisive: clothes-moth silk stays with animal fibers; pantry-moth silk binds dry food.
Open comparison
Side-by-side decision
Indianmeal moth vs. drugstore beetle
Indianmeal moths leave obvious webbing; drugstore beetles leave pinholes and fine product dust without silk.
Open comparison
Source basis
- Carpet BeetlesUC Statewide IPM Program · university extension
- Clothes MothsUC Statewide IPM Program · university extension
- Pantry PestsUC Statewide IPM Program · university extension
- Drain FliesNC State Extension · university extension
- Fungus GnatsUC Statewide IPM Program · university extension
- Powderpost Beetles and Wood-Inhabiting FungiNC State Extension · university extension