The essentials in 30 seconds
Wolf spiders are ground hunters that chase or ambush their prey instead of catching it in a web. Most are gray, brown, black or tan, often with dark stripes, with a body from about 1/4 inch to 1 inch long; Clemson Extension notes that some species reach about 2 inches. The giveaway is the eyes: four small eyes in a row at the front, two large eyes above them and two more on top, and they shine green in a flashlight beam. Females drag a round egg sac from the tip of the abdomen and then carry their spiderlings on their back. Bites are uncommon and usually cause pain, redness and some swelling that fade within about a day. To see fewer indoors: seal gaps, fix screens, move lights away from doors, clear clutter and use sticky traps.
- Wolf spiders have eight eyes; a brown recluse has six.
- They usually come inside in fall, when they wander looking for mates or shelter for winter.
- They eat crickets, cockroaches and flies, so they are allies in the yard.
How to identify a wolf spider
Check three things: the eyes, the way it moves and whether it carries an egg sac or babies.
| Feature | What you see |
|---|---|
| Eyes | Eight eyes in three rows: four small ones in a straight line at the front, two large ones facing forward above them, and two more set wide apart on top of the head |
| Eyeshine | Shine a flashlight held beside your eyes across the lawn at night: wolf spiders reflect it back as tiny green sparks |
| Body | Hairy, sturdy, long legs; gray, brown, black or tan, often with dark or pale stripes along the back |
| Size | Body about 1/4 to 1 inch, females usually larger; the Carolina wolf spider female reaches about 7/8 to 1 3/8 inches |
| Web | No catching web; some dig silk-lined burrows or hide under stones, boards and logs |
| Movement | Runs fast and smoothly over the ground, often at night |
Egg sac and spiderlings on the back
The female spins a pea-sized, round egg sac and attaches it to her spinnerets, at the tip of the abdomen, dragging it everywhere she goes. Clemson Extension notes that a sac can hold more than 100 eggs. When the young are ready, she tears the sac open and the spiderlings climb onto her abdomen, sometimes in several layers, and ride there for one to two weeks or more before scattering. If you see a large spider that looks bumpy or "fuzzy" on its back, look closer: it is probably a mother carrying her young. Squashing her can scatter the spiderlings across the floor, so trap and release her outdoors instead.
Life cycle
For two common species in Pennsylvania, Penn State Extension describes this pattern: mating in autumn, after which males die; mated females spend the winter in sheltered spots, including buildings; egg sacs in May or June; spiderlings in June and July. Some wolf spiders live for nearly two years and females of larger species can live several years.
Wolf spider vs brown recluse and other look-alikes
| Spider | How to tell it apart |
|---|---|
| Wolf spider | Eight eyes in three rows with two large forward-facing eyes; often striped; carries the egg sac on its spinnerets and babies on its back |
| Brown recluse | Six eyes in three pairs; legs and abdomen plain and one color, with fine hairs only and no stripes or bands; violin mark on the front body |
| Fishing spider | Carries its egg sac in its jaws, walks on and dives in water, lacks the two big forward-facing eyes and does not carry young on its back |
| Grass spider | Builds a flat sheet web with a funnel; long rear spinnerets visible from above |
| Jumping spider | Also has large front eyes, but moves jerkily, leaps long distances and hunts by day on plants |
| Tarantula | Much larger and heavier |
The eye count is the decisive test between a wolf spider and a brown recluse. Use a magnifying glass or your phone's zoom on a trapped spider. Stripes or banded legs also rule out a recluse, whose legs and abdomen are always uniformly colored. If you live in recluse country or are still unsure, read our brown recluse guide before deciding what to do.
Are wolf spiders dangerous?
Wolf spiders use venom to subdue their prey, but they are not considered dangerous to people. They bite only when handled roughly or trapped against skin, for example inside a glove or under a hand on the floor. Penn State Extension describes the usual reaction as initial pain, redness and possibly some local swelling that generally subsides within 24 hours, and notes that no serious medical consequences have been reported. Missouri's Department of Conservation describes North American wolf spider bites as harmless, and University of California entomologists compare most spider bites to a bee sting.
When a "spider bite" is something else
University of California researchers point out that many skin wounds blamed on spiders have other causes, including bacterial skin infections. If a sore gets worse over several days, grows or oozes, have a doctor look at it and mention that you never saw the spider bite, if that is the case.
Why wolf spiders come into the house
Wolf spiders live outdoors: in lawns, leaf litter, gardens, woodpiles and under stones. They end up inside for a few predictable reasons:
- Fall wandering: males roam in search of females, and before winter both sexes may move into sheltered places, including basements and garages.
- Flooded burrows: University of California entomologists note that females may wander when rain floods their burrows.
- Construction: clearing and building nearby displaces them.
- Food: outdoor lights draw insects, and the insects draw hunting spiders to doors and windows.
- Gaps: they walk in under doors without sweeps, through torn screens and through gaps around pipes and foundations, or come in on firewood, plants and boxes.
Clemson Extension lists the places they turn up indoors: behind doors, near windows, among houseplants, in closets and behind furniture.
How to keep wolf spiders out
-
01
Seal the way in
Caulk cracks in the foundation and gaps around pipes, cables and window frames. Fit weather stripping and door sweeps, especially on basement, garage and patio doors.
-
02
Fix the screens
Repair holes in window and door screens, which keep out both spiders and the insects they eat.
-
03
Rethink outdoor lighting
Move fixtures off the wall beside doors and windows where you can, or light the path from a short distance away, so insects gather away from the entrances.
-
04
Clear a strip around the house
Keep the area next to the foundation free of leaf litter, heavy mulch, grass clippings, firewood and boards, and trim plants back from the walls.
-
05
Reduce clutter indoors
Store boxes off the floor and away from walls in lidded plastic bins, and keep basements and garages tidy so spiders have fewer places to hide.
-
06
Vacuum regularly
Corners, under furniture, basements and storage areas. Spiders rarely survive the trip through the hose.
-
07
Set sticky traps
Place glue traps flat along walls, behind doors and in the corners of basements and garages, out of reach of children and pets. Check them weekly: they show where spiders enter and also catch the crickets and cockroaches they hunt.
-
08
Remove one by hand
Cover the spider with a jar, slide a card underneath and release it outdoors, well away from the door.
Fewer prey insects means fewer spiders: see our guides to cockroaches, house centipedes and earwigs.
When to call pest control
- Sticky traps keep catching spiders for several weeks after sealing and decluttering.
- You are not sure whether you have wolf spiders or brown recluses, especially in states where recluses live.
- There is also a cricket, cockroach or other insect problem feeding the spiders.
- You need gaps sealed in places you cannot reach safely, such as crawl spaces or high foundations.
Ask the company to identify the spider first, to focus on exclusion and sealing, and to explain any product it plans to use and where. Your county extension office can also identify a spider from a sample or a clear photo.
Wolf spiders: frequently asked questions
Are wolf spiders dangerous?
No. They can bite if handled or trapped against skin, but bites usually cause only pain, redness and swelling that fade within about a day.
What does a wolf spider bite look like?
A red, sore spot, sometimes slightly swollen, like a bee sting. See a doctor if pain keeps growing or swelling becomes severe.
How can I tell a wolf spider from a brown recluse?
Count the eyes: wolf spiders have eight, with two large ones facing forward; a brown recluse has six in pairs and no stripes.
Why is a wolf spider carrying babies on its back?
Females carry their newly hatched spiderlings on the abdomen for one to two weeks or more until the young can live on their own.
Why do I have wolf spiders in my house?
Usually in fall, when they wander for mates or shelter, slipping under doors and through gaps. Outdoor lights near doors draw them by attracting insects.
How do I get rid of wolf spiders?
Seal gaps, fix screens, move lights away from doors, clear clutter and debris, vacuum and use sticky traps.
Do wolf spiders make webs?
No catching webs. They hunt on the ground, and some species line a burrow or hiding place with silk.
How big do wolf spiders get?
Most have bodies from 1/4 to 1 inch long, and some species reach about 2 inches.
Sources
University and state guidance, checked on 27 October 2026.
- Penn State Extension · Wolf spiders ↗Sizes of common species, markings, life cycle, overwintering in buildings, spiderlings on the back and bite symptoms.
- Clemson Home & Garden Information Center · Wolf spiders ↗Size range, eyeshine, prey, egg sac with over 100 eggs, spiderlings riding on the mother, where they turn up indoors and exclusion.
- Missouri Department of Conservation · Wolf spiders ↗Eye arrangement, body size, colors and stripes, egg sac on the spinnerets, how long young ride, look-alikes and bites.
- University of California IPM · Spiders ↗Wolf spider eyes, why spiders come indoors, sealing, lighting, clutter, vacuuming, sticky traps, limits of insecticides and bite first aid.
- UC Riverside · How to identify and misidentify a brown recluse spider ↗Six-eye pattern and uniform, spineless legs of the recluse.
Found a big spider indoors?
Trap it under a jar, count its eyes with your phone's zoom and release it outdoors, then check the door sweep nearest to where it was.