Brown Recluse Spider, Fiddleback Spider, Violin Spider
Loxosceles reclusa (most likely) or a related Sicariidae species
Sicariidae (Six-eyed Sicariid Spiders), Order Araneae. Key family characteristics include the unique arrangement of six eyes in dyads and a tendency to inhabit dry, secluded retreats.
Physical Description
Small, fragile-looking spider with a uniform or slightly patterned oval abdomen and a distinctively shaped cephalothorax bearing a darker violin-like marking pointing toward the rear. The body texture is finely pubescent.
Size Estimate
Body length approximately 6 to 20 millimeters, with a leg span roughly the size of a coin (around 20 to 25 millimeters including legs). This appears to be an adult or sub-adult specimen.
Coloration & Markings
Light brown to yellowish-tan or dark brown body. The key identifying marking is the dark brown violin pattern on the cephalothorax, with the neck of the violin pointing backward toward the abdomen. The abdomen is uniform tan to brown without distinct stripes or bands.
Web Type
Irregular, loose, sticky retreat web usually constructed in dark, undisturbed areas such as baseboards, woodpiles, or closets, rather than a symmetrical orb web.
Eye Arrangement
Uniquely possesses only six eyes arranged in three pairs (dyads): one median pair and two lateral pairs, separated by distinct gaps. This is a defining trait of the Sicariidae family.
Leg Characteristics
Long, thin, delicate legs of a uniform light brown color without prominent banding, spines, or contrasting patterns. They often rest spread out flat against a surface.
Venom & Safety Information
Venom Information
Potent necrotic venom containing the enzyme sphingomyelinase D, which destroys cell membranes and can cause localized tissue destruction (dermonecrosis).
Medical Significance
Potentially medically significant. Bites can result in severe localized tissue necrosis, ulceration, and slow-healing wounds, though many bites result in only mild localized irritation or are asymptomatic.
Safety Recommendations
Shake out shoes and clothing left on the floor, wear gloves when moving stored items in dark spaces, and carefully relocate indoor specimens outdoors using a container and a piece of paper.
Habitat & Behavior
Habitat & Range
Found primarily in the central and southern United States, inhabiting dark, dry, undisturbed microhabitats such as attics, basements, closets, under bark, and behind furniture.
Behavior & Temperament
Reclusive, nocturnal, and non-aggressive. They typically flee from disturbances and only bite when trapped against human skin, such as inside clothing or shoes.
Diet & Prey
Active nocturnal hunters that prey primarily on small insects such as cockroaches, crickets, and silverfish, using their retreat web mainly as a shelter rather than a trap.
Seasonal Activity
Most active during spring, summer, and fall, while often seeking shelter indoors to overwinter during colder months.
Description
The brown recluse is one of North America's most misunderstood spiders. Known for its secretive habits and the distinctive violin-shaped marking on its back, it plays a valuable role in controlling household insect populations while preferring to stay entirely out of human sight.
Key Features
Six eyes arranged in three pairs, a distinct dark violin-shaped marking on the cephalothorax, uniform brown legs without bands, and an absence of strong abdominal patterns.
Similar Species
Cellar spiders (Pholcidae), grass spiders (Agelenidae), and male southern house spiders (Kukulcania hibernalis) are often mistaken for brown recluses due to similar coloration, but can be distinguished by eye count, body proportions, and web types.
Life Cycle
Females produce several egg sacs containing around 30 to 50 eggs each during the warmer months. Spiderlings molt multiple times before reaching maturity, with a total lifespan typically ranging from 1 to 3 years.
Ecological Importance
Acts as an effective apex predator for household and outdoor insect pests, helping to naturally regulate populations of crawling bugs in its range.
Conservation Status
Not evaluated by the IUCN, but highly abundant and secure throughout its native geographic range.
Interesting Facts
Brown recluses can survive for months without food or water in extreme conditions and are exceptionally resilient inhabitants of dark structural voids in human dwellings.
Photography Tips
Photograph from a safe distance using a macro lens, focusing clearly on the dorsal view of the cephalothorax to capture the violin pattern and the eye arrangement.
Identified: 2026-08-21T05:18:47.353614