Photo: Patrick Edwin Moran, CC BY-SA 3.0, via Wikimedia Commons
Kansas City Pest Identification
Lycosidae (Hogna, Tigrosa, and others)Wolf Spider Identification
The big, fast, hairy spider that runs across the basement floor in October. Wolf spiders hunt on foot instead of building webs, and they are a nuisance, not a danger.
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How to Identify It
Brown and gray with dark stripes on the head and back, stout hairy legs, and large forward-facing eyes that reflect a flashlight beam at night. Females carry a round egg sac on their spinnerets and later carry dozens of spiderlings on their back.
Size: Body 10–35 mm; some species larger than a half-dollar with legs
Commonly Confused With
Frequently reported as a brown recluse or a tarantula. Wolf spiders have banded or striped legs and a patterned body; recluses are plain. Grass spiders look similar but sit in a funnel web.
Why It Shows Up
They wander in under doors and through gaps chasing insects, and more of them come in as nights cool in fall. They do not establish indoor populations the way recluses do.
Where Homeowners Find It
Basement floors, garages, window wells, under doors, and around exterior lighting. Outdoors in lawns, mulch, leaf litter, and under stones.
Seasonal Activity in KC
Outdoors spring through fall; indoor sightings spike September through November.
Risk Level
A bite is possible if one is pinned against skin but is comparable to a bee sting. They are beneficial predators of crickets, roaches, and other insects.
What You Can Do Yourself
- • Install door sweeps and seal the gap under the garage door — most wolf spiders walk in.
- • Switch exterior bulbs to warm/yellow LEDs to draw fewer insects.
- • Clear leaf litter and mulch back from the foundation.
What Professional Treatment Involves
Exterior perimeter treatment and treatment of the insect population they are following, plus sealing recommendations. Interior sightings usually stop once the perimeter and entry points are addressed.
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Common Questions
How do I tell a wolf spider from something that looks similar?
Frequently reported as a brown recluse or a tarantula. Wolf spiders have banded or striped legs and a patterned body; recluses are plain. Grass spiders look similar but sit in a funnel web.
Do I need professional treatment for wolf spider?
Exterior perimeter treatment and treatment of the insect population they are following, plus sealing recommendations. Interior sightings usually stop once the perimeter and entry points are addressed.