Brown Recluse, Violin Spider, Fiddleback Spider
Loxosceles reclusa
Family Sicariidae (Six-eyed Sand Spiders and Recluses), Order Araneae
Physical Description
A medium-sized spider with a relatively flat cephalothorax and an oval-shaped, bulbous abdomen. The body has a fine, velvet-like texture due to short, dense hairs. It lacks spines on its legs and has a characteristic violin-shaped mark on the cephalothorax.
Size Estimate
Body length 6-20 mm (1/4 to 3/4 inch); leg span typically 1 to 1.5 inches. This appears to be a subadult or adult specimen.
Coloration & Markings
Uniformly tan to dark brown abdomen without stripes or spots. The cephalothorax features a distinct dark brown, violin-shaped (or fiddle) marking with the 'neck' of the violin pointing toward the abdomen.
Web Type
Irregular, messy, off-white tangles of silk. These webs are typically used as retreats or hideouts rather than for active trapping, and are usually built in undisturbed, dark corners.
Eye Arrangement
Six eyes arranged in three pairs (dyads) in a semi-circle: one median pair and two lateral pairs. This is a primary diagnostic feature differentiating them from the common eight-eyed spiders.
Leg Characteristics
Long, thin, and tapering legs that are uniformly colored with no banding. The legs are held in a somewhat sprawled, flattened posture when at rest and lack thick spines.
Venom & Safety Information
Venom Information
Possesses a necrotizing venom containing sphingomyelinase D. This enzyme causes tissue damage (necrosis) in a small percentage of cases, though most bites result in minor localized irritation.
Medical Significance
Medically significant but rarely lethal. Symptoms include a 'bullseye' lesion, localized pain, and potential necrotic ulcers. Systemic reactions (loxoscelism) are rare but serious. Seek medical attention if a bite is suspected.
Safety Recommendations
Shake out clothing and shoes stored in dark places. Wear gloves when handling firewood or moving boxes. Use sticky traps for monitoring indoors. If bitten, apply ice and seek medical consultation.
Habitat & Behavior
Habitat & Range
Commonly found in the Midwestern and Southeastern United States. They prefer dark, dry, undisturbed areas like woodpiles, sheds, basements, attics, and behind furniture or inside rarely worn clothing/shoes.
Behavior & Temperament
Reclusive and non-aggressive; they typically flee from perceived threats. Bites usually occur only when the spider is pressed against skin (e.g., inside clothing or bedding). They are primarily nocturnal hunters.
Diet & Prey
Generalist predators that eat a variety of insects and other spiders. They are active hunters that leave their retreats at night to scavenge or hunt down prey rather than waiting in a web.
Seasonal Activity
Most active from spring through autumn. During winter, they remain largely inactive in protected indoor or underground locations.
Description
The Brown Recluse is a shy, misunderstood arachnid common to the American South and Midwest. Known for its 'violin' marking and six eyes, it plays a vital role in controlling indoor pest populations while avoiding human interaction whenever possible.
Key Features
Violin-shaped marking on the cephalothorax, six eyes in three pairs, uniformly colored legs (no bands), and a solid-colored abdomen.
Similar Species
Often confused with Kukulcania hibernalis (Southern House Spider), Tegenaria domestica (Barn Funnel Weaver), and various Wolf Spiders, which all have eight eyes and different markings.
Life Cycle
Females produce 1-5 egg sacs containing about 50 eggs each. Spiderlings take about a year to mature and adults can live 2 to 4 years. They are remarkably resilient to starvation and dehydration.
Ecological Importance
Act as important predators of indoor pests such as cockroaches, silverfish, and crickets, helping to maintain a balance in the domestic and natural ecosystems.
Conservation Status
Not listed by the IUCN. Populations are stable and they are considered common within their native range.
Interesting Facts
Brown Recluses can survive for months without food or water. Despite their fearsome reputation, many homes in endemic areas harbor hundreds of these spiders without the residents ever suffering a bite.
Photography Tips
Focus on the cephalothorax (head region) to capture the violin mark and the eye arrangement. Side-lit shots help highlight the texture and leg proportions for identification.
Identified: 2026-07-11T18:43:07.732137