Brown recluse spiders (Loxosceles reclusa) are predominantly found in the south-central and midwestern United States, ranging from the Gulf States north to Nebraska and Ohio. In terms of habitat, they show a strong preference for secluded and undisturbed environments. Outdoors they inhabit areas beneath rocks and logs, while indoors they gravitate toward dark corners, storage boxes, furniture, closets, basements, and cellars.
Brown recluses are especially drawn to cardboard because it mimics their natural preference for rotting tree bark. This affinity for cardboard boxes is also the primary way they are accidentally transported to areas outside their native range.
Quick Identification
Size: 1/4 to 1/2 inch body length
Color: Light brown with a velvet-like appearance from fine body hairs
Key Marking: Violin-shaped mark on the cephalothorax (darker in mature spiders)
Eyes: Six eyes arranged in a semicircle (most spiders have eight)
Scientific Name: Loxosceles reclusa
In This Article:
- Where They Are Found
- Brown Recluse Habitat
- Where They Hide Indoors
- What They Look Like
- Habits and Reproduction
- Are They Aggressive?
- Are They Dangerous?
- What a Bite Looks Like
- Prevention
- Where Can You Find Brown Recluse Spiders?
- Where Do Brown Recluses Hide Indoors?
- What Do Brown Recluses Look Like?
- Brown Recluse Spider Habits and Reproduction
- Are Brown Recluses Aggressive?
- Are Brown Recluses Dangerous?
- What Does a Brown Recluse Spider Bite Look Like?
- How to Prevent Brown Recluse Spiders
Key Facts
16 south-central and midwestern US states
Up to 50 eggs; hatch in approximately one month
Up to 6 months in extreme drought and starvation conditions
90% of bites heal with only minor symptoms

The violin-shaped marking on the cephalothorax and six eyes arranged in a semicircle are the two most reliable ways to identify a brown recluse spider.













