Brown Recluse, Violin Spider, Fiddleback Spider
Loxosceles reclusa
Sicariidae (Six-eyed Sicariid Spiders), Order Araneae. Key family trait includes having only six eyes arranged in three pairs.
Physical Description
The spider has a flattened cephalothorax and an oval-shaped abdomen. It possesses a smooth, почти hairless texture to the naked eye, though it is covered in very fine hairs (setae). This specimen is a male, evidenced by the prominent, bulbous pedipalps (the small 'arm-like' structures near the mouth).
Size Estimate
Body length is typically 6-20mm (1/4 to 3/4 inch). With legs extended, the span is roughly the size of a U.S. quarter to a half-dollar (about 1 to 1.5 inches).
Coloration & Markings
Uniformly light to medium brown or tan. The most distinctive marking is a dark brown, violin-shaped (or fiddle-shaped) pattern on the cephalothorax, with the neck of the violin pointing toward the abdomen. The abdomen is monochromatic with no spots or stripes.
Web Type
Irregular, sticky, off-white or grayish 'tangle' webs. These are not used for catching prey in flight but serve as a retreat or 'mat' in undisturbed, dark locations like basements, closets, or woodpiles.
Eye Arrangement
Highly distinctive: 6 eyes arranged in three pairs (dyads) forming a semi-circle (one median pair and two lateral pairs). Most spiders have 8 eyes.
Leg Characteristics
The legs are long, slender, and solid-colored with no banding or spines. They are covered in fine hairs but lack the thick, visible spines found on wolf spiders or grass spiders. They often hold a somewhat flattened posture.
Venom & Safety Information
Venom Information
Contains sphingomyelinase D, a cytotoxic (tissue-destroying) enzyme. While most bites result in minor redness, some can cause necrotic skin lesions (loxoscelism) or, rarely, systemic reactions.
Medical Significance
Medically significant. While rarely fatal, bites can cause necrotic ulcers that take months to heal. Treatment involves cleaning the wound, rest, ice, elevation (RICE), and monitoring for spreading redness or systemic symptoms. Seek medical attention if a lesion develops.
Safety Recommendations
Shake out shoes and clothing stored in dark areas. Use glue traps in corners to monitor populations. Wear gloves when handling firewood or moving stored boxes. Do not crush with hands; use a vacuum or glass to relocate.
Habitat & Behavior
Habitat & Range
Primarily found in the Central and Southern United States (from Nebraska to Texas and east to Georgia). They prefer dark, dry, undisturbed areas such as attics, crawlspaces, behind baseboards, and inside stored cardboard boxes.
Behavior & Temperament
Reclusive and non-aggressive; they typically flee from threat. Most bites occur when the spider is pressed against skin (e.g., inside clothing, shoes, or bedding). They are nocturnal hunters that leave their retreats at night to forage.
Diet & Prey
They are scavengers and opportunistic hunters, feeding on soft-bodied insects like silverfish, crickets, and cockroaches. They use their potent venom to quickly submerge prey.
Seasonal Activity
Most active from March through October. Mating and egg-laying typically occur in the warmer summer months.
Description
The Brown Recluse is one of the most misunderstood and feared spiders in North America. This shy, nocturnal arachnid is best identified by its 'violin' marking and its six-eye arrangement. Despite its reputation, it prefers to avoid human contact entirely, playing a vital role in controlling indoor insect populations.
Key Features
Violin-shaped mark on cephalothorax; 6 eyes in three pairs; uniformly colored legs without spines; solid-colored abdomen.
Similar Species
Often confused with Southern House Spiders (Kukulcania hibernalis), which have 8 eyes and longer pedipalps, or Cellar Spiders (Pholcidae), which have much thinner, longer legs.
Life Cycle
Females produce one to five egg sacs (about 50 eggs each) during the summer. Spiderlings take about a year to reach maturity. Adults are long-lived for spiders, often living 2 to 4 years.
Ecological Importance
Serves as an apex predator within the micro-ecosystems of crawlspaces and attics, providing significant natural pest control of silverfish and cockroaches.
Conservation Status
Not listed on IUCN Red List; they are common and stable throughout their native range.
Interesting Facts
The Brown Recluse can go for several months without food or water. Unlike many spiders, they do not wrap their prey in silk immediately but bite to envenomate and then wait for the prey to die.
Photography Tips
A macro shot focusing on the top of the 'head' (cephalothorax) to show the violin and the eye arrangement is essential for positive ID. Ensure there is enough light to see if the legs have spines or bands.
Identified: 2026-06-16T00:17:43.130170