Brown Recluse Spider

Loxosceles reclusa

Venomous brown spider with violin-shaped marking, causes necrotic skin lesions.

Insect Extreme Risk

About Brown Recluse Spider

Brown recluse spiders are venomous spiders with a distinctive violin or fiddle-shaped marking on their cephalothorax (upper body). Adults measure 1/4 to 1/2 inch in body length with legs extending up to 1 inch. They're light to dark brown and have six eyes arranged in three pairs (unusual - most spiders have eight). True to their name, they're reclusive, avoiding human contact and preferring undisturbed areas. They build irregular webs for hiding, not catching prey. Most active at night. Bites typically occur when spider is trapped against skin.

Identification

Light to dark brown. 1/4 to 1/2 inch body length. Violin or fiddle-shaped marking on back (cephalothorax). Six eyes in three pairs (unusual). Long, thin legs. No spines on legs.

Signs of Infestation

Spiders in undisturbed boxes, closets, or stored items. Irregular webs in dark corners. Spider sightings at night. Skin lesions that don't heal (from bites). Shed skins. Multiple spiders in one area.

Health & Safety Risks

Brown recluse venom causes necrotic skin lesions that can take months to heal. Bites initially painless but develop into deep, ulcerating wounds. Systemic effects include fever, chills, nausea, joint pain. Rarely fatal but can cause severe scarring. Seek immediate medical attention.

Prevention Tips

Reduce clutter, especially in storage areas. Seal cracks and crevices. Shake out clothing and shoes before wearing. Use plastic storage containers instead of cardboard. Keep bedding off floor. Wear gloves when cleaning storage areas. Install tight-fitting screens.