Brown Recluse, Violin Spider, Fiddleback Spider
Loxosceles reclusa (likely)
Sicariidae (Six-eyed Sand Spiders and Recluses), Order Araneae
Physical Description
The brown recluse has a relatively flat cephalothorax and an oval-shaped abdomen. The body is covered in fine, short hairs giving it a velvety texture. Its most distinct feature is the violin-shaped marking on the top of the head area.
Size Estimate
Body approx. 6–20 mm (1/4 to 3/4 inch); leg span approx. 25–40 mm (about the size of a U.S. quarter). This specimen appears to be an adult based on proportions.
Coloration & Markings
Uniformly light tan to dark brown abdomen without patterns. The cephalothorax features a dark brown, violin-shaped mark with the 'neck' of the violin pointing toward the rear.
Web Type
Irregular, sticky, off-white tangle or retreat web, usually located in dark, undisturbed areas such as corners or behind boxes.
Eye Arrangement
Six eyes arranged in three pairs (dyads) in a semi-circle: one median pair and two lateral pairs. This distinguishes them from most other spiders which have eight eyes.
Leg Characteristics
Long, slender, and uniformly colored legs without spines, thick hairs, or banding. They are usually held in a sprawling, outward position.
Venom & Safety Information
Venom Information
Cytotoxic (necrotic) venom containing the enzyme sphingomyelinase D, which can cause skin tissue death and, in rare cases, systemic reactions.
Medical Significance
Medically significant. Most bites result in minor redness, but some develop into a necrotic ulcer. Severe cases may involve loxoscelism (systemic illness). Seek medical attention if a bite is suspected.
Safety Recommendations
Shake out shoes and clothing stored in closets. Use glue traps for monitoring. Do not handle with bare hands; relocate using a jar and stiff paper if necessary.
Habitat & Behavior
Habitat & Range
Native to the Central and Southeastern United States. They prefer dark, dry, undisturbed microhabitats like woodpiles, basements, closets, and attics.
Behavior & Temperament
Reclusive, nocturnal hunters. They are non-aggressive and typically only bite when pressed against skin, such as when trapped in clothing or bedding.
Diet & Prey
Primarily scavengers of dead insects, but they also hunt silverfish, crickets, and other small arthropods using a 'sit-and-wait' or active nocturnal hunting strategy.
Seasonal Activity
Most active during the warmer months (March through October) for mating and foraging, though they remain present indoors year-round.
Description
The Brown Recluse is a modest-looking but medically significant spider known for its 'violin' mark. It is a shy, nocturnal creature that avoids human contact, playing a role in consuming household pests.
Key Features
Dull brown/tan color; violin-shaped marking on cephalothorax; six eyes in three pairs; lacks leg spines or bands.
Similar Species
Cellar spiders (Pholcidae), Southern House Spiders (Kukulcania hibernalis), and Wolf spiders (Lycosidae) are frequently misidentified as Recluses.
Life Cycle
Females produce 1-5 egg sacs containing about 50 eggs each. They can live for 1 to 2 years, reaching maturity in about a year. They are remarkably resilient to starvation.
Ecological Importance
Acts as a natural pest control agent in indoor and outdoor environments, focusing on crawling insects that other spiders might ignore.
Conservation Status
Not evaluated by IUCN; generally stable and considered a common synanthropic species (often living near humans).
Interesting Facts
A Brown Recluse can go for several months without food or water. Despite their reputation, they are responsible for far fewer severe medical incidents than public fear suggests.
Photography Tips
Focus on the cephalothorax (the front body segment) from a top-down view to capture the 'violin' mark and eye arrangement for definitive ID.
Identified: 2026-06-15T01:43:13.593955