Brown Recluse Spider
(Loxosceles reclusa)
A venomous spider identified by the violin-shaped marking on its back, common in Kentucky homes.

Overview
The brown recluse is one of the most medically significant spiders in Kentucky. Its venom can cause necrotic skin lesions that require medical attention. Despite their fearsome reputation, brown recluses are shy, non-aggressive spiders that typically bite only when trapped against skin. They are extremely common in Bowling Green homes — it is not unusual for a single house to harbor hundreds of individuals. They are nocturnal hunters that do not use webs to catch prey.
Appearance
Brown recluse spiders are small to medium-sized, with a body length of 1/4 to 1/2 inch and a leg span of about 1 inch. They are uniformly light to medium brown with a distinctive darker violin- or fiddle-shaped marking on the top of the cephalothorax (the "neck" of the fiddle points toward the abdomen). A key identification feature is their six eyes arranged in three pairs (semicircular pattern), unlike most spiders which have eight.
Habitat
Brown recluses are true to their name — they are reclusive and prefer undisturbed, dark spaces. Inside homes, they hide in cardboard boxes, behind picture frames, in closets, under furniture, in shoes, and in folded clothing that has been stored. They are commonly found in garages, attics, basements, and crawl spaces. They can go months without food or water.
Diet
Brown recluses are active nocturnal hunters that do not build capture webs. They prey on small insects including crickets, cockroaches, silverfish, and other soft-bodied insects. They wander in search of prey rather than waiting for it in a web.
Lifecycle
Females produce 1 to 5 egg sacs per year, each containing about 50 eggs. Spiderlings hatch in about a month and undergo 7 to 8 molts over roughly a year before reaching maturity. Adults can live 2 to 4 years. They are incredibly resilient, capable of surviving months without food, water, or favorable conditions.
Signs of Infestation
- !Small, irregular cobwebs in undisturbed corners, boxes, or storage areas
- !Shed skins (exuviae) in quiet, hidden areas — brown recluses molt multiple times
- !Seeing light brown spiders with long, thin legs in basements, garages, or closets
- !Finding spiders inside shoes, clothing, or bedding that has been undisturbed
Prevention Tips
- ✓Reduce clutter, especially cardboard boxes and stored clothing
- ✓Shake out shoes and clothing before wearing, especially items from storage
- ✓Pull beds away from walls and keep bedding from touching the floor
- ✓Use plastic storage bins with tight lids instead of cardboard boxes
- ✓Install door sweeps and seal gaps around windows and utility penetrations
- ✓Use sticky traps (glue boards) in closets, basements, and garages to monitor populations
Professional Treatment
Professional brown recluse treatment involves a combination of targeted residual sprays in cracks, crevices, and known hiding areas; dust applications behind outlets, switch plates, and in wall voids; and strategic placement of glue traps for monitoring. Because brown recluses can be present in large numbers and are well-hidden, treatment typically requires multiple visits over several months for significant population reduction. Habitat modification — reducing clutter and sealing entry points — is a critical component of long-term success.
Did You Know?
- •Brown recluses have six eyes instead of the eight that most spiders have.
- •They can survive up to 6 months without food or water.
- •A single home in Kansas was documented as having over 2,000 brown recluses — yet no one in the family was bitten.
- •Their violin marking has earned them the nickname 'fiddleback spider.'
1/4 to 1/2 inch body
Light to medium brown with darker violin-shaped mark
8
Round body, long thin legs
Fiddle-back spider, Violin spider
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