Hobo spiders and southern house spiders are two of the most commonly misidentified spiders found in homes across the United States. Neither is considered medically dangerous, despite persistent myths about hobo spider bites causing serious wounds. If you’ve spotted a brown spider indoors and you’re trying to figure out which one you’re looking at, the differences in appearance, web style, geography, and behavior are straightforward once you know what to look for.
Where Each Spider Lives
These two spiders occupy largely different parts of the country, which is one of the fastest ways to narrow down what you’re dealing with. Hobo spiders are found primarily in the Pacific Northwest and northern Rocky Mountain states, including Washington, Oregon, Idaho, Montana, Utah, and parts of Colorado. They were introduced from Europe and have established themselves across much of the western U.S., particularly in drier inland areas.
Southern house spiders, as their name suggests, are concentrated in the southern United States. They’re common across the Southeast from Florida to Texas, and their range extends into parts of the mid-Atlantic. They thrive in warm, humid climates and are especially abundant in Florida, Louisiana, and the Gulf Coast states. If you live in the overlap zone (parts of the southern Rockies or the central U.S.), geography alone won’t rule one out, but for most people, your location narrows it to one species immediately.
How to Tell Them Apart
Both spiders are brown, roughly similar in size, and show up in similar indoor locations, which is why they’re so frequently confused. But they belong to completely different spider families and have distinct physical features.
Hobo spiders are funnel-web weavers with a relatively uniform brown body and chevron-shaped markings on the abdomen. They have long legs relative to their body, giving them a leggy, somewhat lanky appearance. Their bodies are usually about half an inch long, with a leg span around one to two inches. They lack the dark bands on their legs that many other brown spiders have, which can actually help distinguish them from similar-looking species like giant house spiders.
Southern house spiders show a dramatic difference between males and females. Females are compact, dark brown to charcoal, and covered in fine velvety hairs. They tend to stay close to their webs and are rarely seen wandering. Males look entirely different: they’re lighter brown with longer, more slender bodies and proportionally longer legs. Male southern house spiders are frequently mistaken for brown recluse spiders because of their body shape and color, but they lack the brown recluse’s distinctive violin-shaped marking on the head region.
Web Differences
The webs these two spiders build are nothing alike, and checking the web is often the easiest identification method when you find a spider in your home.
Hobo spiders are classified as funnel-web weavers, but their webs don’t always look like the classic funnel shape you might picture. Their webs are almost always hidden under objects rather than built out in the open, and they’re described as flat, sheet-like structures tucked beneath furniture, boxes, woodpiles, or driftwood. The spider waits at one end for vibrations that signal prey has wandered onto the sheet.
Southern house spiders build tangled, woolly-looking webs that radiate outward from cracks, crevices, or holes in walls. These webs are made of cribellate silk, which has a distinctly fuzzy or cottony texture compared to the smooth silk most spiders produce. You’ll typically find them around window frames, door frames, shutters, and exterior light fixtures. The webs can accumulate over time and become quite noticeable, often looking like messy, irregular cobwebs spreading out from a central retreat point.
Neither Spider Is Medically Dangerous
The hobo spider spent decades on informal lists of dangerous spiders in the U.S., and that reputation has been slow to fade. For years, hobo spider bites were blamed for necrotic skin lesions, similar to what a brown recluse bite can cause. The scientific evidence has thoroughly debunked this. There is no conclusive evidence that hobo spider venom causes tissue death in humans, and a large body of research demonstrates it does not. The Washington State Department of Health now states plainly that hobo spiders “are not considered dangerous as previously thought.”
Many of the necrotic wounds historically attributed to hobo spiders were likely caused by bacterial infections, particularly MRSA (a type of antibiotic-resistant staph infection). Bacteria can enter the body through any small puncture, including a spider bite, but the spider’s venom itself isn’t what causes the wound to worsen. This same pattern of misattribution has affected several spider species across the country.
The hobo spider’s common nickname, “the aggressive house spider,” adds to the confusion. That name comes from a mistranslation of its Latin species name, agrestis, which actually means “rural” or “of the fields,” not “aggressive.” Hobo spiders are not known to be naturally aggressive either in their native European range or in the United States.
Southern house spiders are similarly harmless. They are not known to have a dangerous bite. In the rare documented bite cases, victims experienced pain and swelling that resolved within about two days. These spiders are generally reluctant to bite and are far more likely to retreat into their web than to act defensively.
Behavior and Habits Indoors
Hobo spiders are ground-level spiders. They’re poor climbers on smooth surfaces, so you’re most likely to encounter them at floor level: in basements, garages, ground-floor rooms, and along baseboards. They often end up in bathtubs or sinks not because they came through the drain, but because they fell in and can’t climb the smooth sides back out. They’re most commonly seen indoors during late summer and fall, when males wander in search of mates.
Southern house spiders are much more sedentary. Females build a web and stay there, sometimes for years, expanding the same web structure over time. They’re found both indoors and on the exterior of buildings, particularly around light fixtures that attract insects. Males are the ones you’re more likely to see wandering at night, and because of their resemblance to brown recluse spiders, these roaming males generate a lot of unnecessary alarm. If you’re in the Southeast and you spot what you think is a brown recluse running across the floor at night, there’s a good chance it’s actually a male southern house spider.
Managing Them at Home
Because neither spider poses a real health risk, management is more about comfort and tidiness than safety. For hobo spiders, reducing ground-level clutter in basements and garages removes the sheltered spots where they build webs. Sealing gaps around doors, windows, and foundations limits entry points. Sticky traps placed along walls and in corners are effective for monitoring and reducing indoor populations.
For southern house spiders, the most visible issue is web accumulation on the exterior of your home. Regularly brushing away webs from doorframes, eaves, and light fixtures discourages them from rebuilding in the same spots. Switching exterior lights to yellow or sodium vapor bulbs reduces the insect activity that draws these spiders to those locations in the first place. Indoors, sealing cracks in walls and around window frames eliminates the retreat points they need to establish a web.
Relocating either spider outdoors with a cup and piece of paper is a perfectly reasonable approach. Both species are beneficial predators that feed on insects, and neither has any interest in biting people unless physically pressed against skin.