Varied Carpet Beetle
Fabric & Paper Pests

Varied Carpet Beetle

Anthrenus verbasci

Quick ID Markers

1Tiny, 1/16"–1/8" long, nearly round body
2Distinctive mottled pattern of white, brown, and yellow scales
3Pattern looks like an irregular mosaic
4Larvae are oval, brown/tan, covered in stiff hairs
5Adults feed on pollen — commonly found at windows in spring

Habits & Biology

One of the most common fabric pests. Larvae eat wool, silk, fur, feathers, leather, and dried foods. Adults feed on pollen outdoors and enter homes to lay eggs. Pattern of scales is highly diagnostic — no other carpet beetle has this mottled look.

Typical Hiding Areas

Under carpet and rug edges, inside closets, in heating vents, in accumulated dust and lint, in museum collections, in stored clothing, and bird/insect nests.

Signs of Activity

Tiny round beetles at windows in spring (adults leaving to feed on flowers)
Ragged holes in wool, silk, or fur textiles
Brown hairy larval skins shed near damage
Damage concentrated along folds and seams of stored items

🗓️ Seasonality

Adults active outdoors spring–summer. Larvae cause damage year-round indoors. New infestations often begin in spring when adults enter from outside.

⚠️ Mistaken Identity

Black Carpet Beetle (solid black, no pattern)Furniture Carpet Beetle (similar but larger white patches)Spider Beetle (more rounded, longer legs)

🧪 Treatment Plan

Same integrated approach as Black Carpet Beetle: deep vacuuming, textile treatment, and residual spray along carpet edges and baseboards.

Vacuum every carpet, rug, and hard floor — paying special attention to edges, baseboards, heating vents, and under furniture.

Weekly vacuuming is the single most effective preventive and corrective action
Dispose of vacuum bag outside immediately

Prevention After Treatment

  • •Vacuum weekly with attention to edges
  • •Bring cut flowers inside only briefly — adults hitchhike on flowers
  • •Seal stored textiles in airtight containers
  • •Screen all attic and exterior vents
This application is an independent educational resource and is not affiliated with or endorsed by any government agency.
⚠️ AI-assisted identification reviewed by a licensed applicator. Always verify critical information before acting.