Brown Recluse, Violin Spider, Fiddleback Spider
Loxosceles reclusa
Sicariidae (Six-eyed Sand Spiders and Reclines), Order Araneae
Physical Description
A medium-sized spider with a relatively flat cephalothorax and an oval-shaped abdomen. The body is covered in fine, short hairs giving it a matte appearance. It lacks thick spines on the legs. In this specimen, the characteristic 'violin' marking is visible on the dorsal cephalothorax.
Size Estimate
Body length is approximately 6-20 mm. Based on the scale next to the spoon and remote, this appears to be an adult specimen with a leg span of about 1 to 1.5 inches.
Coloration & Markings
Uniformly light to medium brown or tan abdomen and legs. The cephalothorax features a distinct, darker brown, violin-shaped marking with the 'neck' of the violin pointing toward the rear of the spider.
Web Type
Builds irregular, asymmetric 'tangle' webs. These are not used for catching prey but serve as a retreat. Webs are typically hidden in dark, undisturbed areas like closets, basements, or woodpiles.
Eye Arrangement
Six eyes arranged in three pairs (dyads) in a semi-circle across the front: one median pair and two lateral pairs. Most spiders have eight eyes.
Leg Characteristics
The legs are long, slender, and monochromatic, matching the body color. They lack heavy spines or distinct banding/striping, though fine hairs are present.
Venom & Safety Information
Venom Information
Contains a potent cytotoxic (tissue-destroying) enzyme called sphingomyelinase D. Most bites result in minor localized irritation, but a small percentage can cause necrotic skin lesions.
Medical Significance
Medically significant. Bites can lead to loxoscelism, characterized by a 'bullseye' lesion, necrosis, and in rare cases, systemic symptoms like fever. If a bite is suspected, seek medical attention and apply ice.
Safety Recommendations
Shake out clothes and shoes left on the floor. Wear gloves when moving boxes in storage areas. If found, use a cup and paper for relocation or contact professional pest control for infestations.
Habitat & Behavior
Habitat & Range
Primarily found in the central and southeastern United States. They inhabit dark, secluded areas such as behind baseboards, in attics, within stored clothing/shoes, and under rocks or wood outdoors.
Behavior & Temperament
Reclusive and non-aggressive. They are active hunters that leave their retreats at night to search for food. Bites typically only occur when the spider is pressed against skin (e.g., inside clothing or bedding).
Diet & Prey
Feeds on soft-bodied insects like crickets, cockroaches, and silverfish. They are known to scavenge on dead insects as well.
Seasonal Activity
Most active from spring through autumn. During winter, they typically remain dormant in protected indoor locations.
Description
The Brown Recluse is a modest-looking spider often identified by the dark violin shape on its tan cephalothorax. While it carries a reputation for danger, it is a shy species that prefers to stay out of sight in the darkest corners of human habitations.
Key Features
Uniformly colored legs (no bands), violin-shaped marking on the head, and specifically six eyes in three pairs.
Similar Species
Cellar spiders (long legs, different body), Wolf spiders (more robust, distinct eye pattern), and Southern House Spiders (similar color but different eye cluster).
Life Cycle
Females produce 1-5 egg sacs containing about 50 eggs each. Spiderlings reach maturity in about a year. Adults can live for 1 to 2 years, often surviving months without food or water.
Ecological Importance
Serves as an important predator of household pests, helping to control populations of unwanted insects like cockroaches and silverfish.
Conservation Status
Not listed on the IUCN Red List. Populations are stable and highly adapted to human environments.
Interesting Facts
The brown recluse is incredibly resilient and can survive severe droughts and long periods of starvation. Their venom is remarkably complex, evolved to break down cellular membranes.
Photography Tips
Focus on the 'violin' marking on the cephalothorax. A clear macro shot of the eyes (to count the three pairs) is the definitive way to confirm identification.
Identified: 2026-05-21T01:45:40.490091