Brown Recluse Spider

Look for the characteristic dark ‘violin’ marking pointing toward the rear of the body, uniform tan to brown coloration, and the spider’s habit of hiding in cluttered, dry crevices rather than building orb webs. Confirmed identification should be done by an expert—many harmless spiders are mistaken for brown recluses.

Sightings of live spiders in bedrooms, closets or basements; small flattened webs near ceilings or behind furniture; round, tan egg sacs (about 8–10 mm); shed skins; multiple captures on glue traps; residents reporting unexplained bites—especially those that worsen over several days.

Professionals begin with a thorough inspection of interior spaces (attics, closets, basements, crawl spaces), exterior harborage (woodpiles, rock walls, sheds), and common entry points. Treatment typically combines targeted interior residual sprays along baseboards and voids, insecticidal dust in attics, wall voids and behind outlets, strategic placement of glue traps for monitoring, and exclusion work (sealing gaps, door sweeps). Follow-up visits reduce reinfestation risk and include sanitation advice and monitoring. Technicians also remove egg sacs and treat localized harborage rather than applying broad broadcast applications inside living spaces.

Reduce indoor clutter and store items in sealed plastic bins; move firewood and debris at least 20 feet from the house and off the ground; seal cracks in foundations, around pipes and under siding; install door sweeps and repair damaged screens; maintain lower indoor humidity (use ventilation or dehumidifiers in basements/attics); hang outdoor clothing and inspect shoes before putting them on; place sticky traps along baseboards and in closets to detect activity early.

Prefers dark, dry, undisturbed microhabitats: behind baseboards, inside closets, under beds, attic corners, crawl spaces, inside stored boxes and furniture, woodpiles, rock walls and outbuildings. In the WNC mountains, shaded exterior stone or timber structures and insulated historic homes often provide ideal retreats.

{prevalence_note} In the Asheville and greater Western North Carolina mountain area, established brown recluse populations are less widespread than in some central-southern states, but isolated populations and occasional introductions do occur. The region’s humid, wooded terrain, abundant stone walls and historic homes with crawl spaces create pockets of suitable habitat—especially around mountain cabins, older Craftsman bungalows and cluttered storage areas.