Original illustration by PestControlBasics.com. Use anatomical labels above to confirm your identification.
Original illustration by PestControlBasics.com. Use anatomical labels above to confirm your identification.
Original illustration by PestControlBasics.com. Use anatomical labels above to confirm your identification.
Original illustration by PestControlBasics.com. Use anatomical labels above to confirm your identification. For photo references, see the identification section below.
🔍 Identification
Definitive ID requires: 6 eyes (3 pairs in a semicircle) — most spiders have 8 eyes. Violin-shaped marking on cephalothorax (unreliable alone — many spiders have similar markings). Uniform abdomen color — no mottling, spots, or banding. 8-15mm body. Get a photo — the 6-eye pattern requires magnification to confirm.
🧬 Biology & Behavior
Verified range: Missouri, Arkansas, Oklahoma, Kansas, Tennessee, Kentucky, Alabama, Mississippi, Louisiana, Texas, Nebraska, Iowa, and adjacent states. NOT established in: California (occasional importations only), New England, Pacific Northwest, or most of Florida. This geographic reality is critical — the vast majority of 'brown recluse bites' diagnosed in California or New York are something else.
⚠️ Damage & Health Risk
Necrotic wound (rare — occurs in 10-15% of documented bites); systemic effects (rare); significant tissue damage in severe cases. The majority of brown recluse bites cause minimal or no symptoms.
🔧 DIY Treatment
Inside verified range: sticky traps placed along walls (they walk the floor); reduce clutter where they hide; professional residual spray in voids. Don't shake out clothing in affected areas. Keep shoes off the floor in infested buildings.
👷 When to Call a Pro
In verified range with heavy infestations: professional void treatment with residual spray and desiccant dust.