Spider Control in Marshalltown

Common Spiders Found in Marshalltown Homes

Several spider species turn up regularly in Marshall County properties. Knowing which species you’re dealing with helps set realistic expectations about behavior and risk.

Wolf Spiders

Wolf spiders are large, fast-moving, ground-hunting spiders that don’t build webs. They’re among the most common accidental invaders in Iowa homes, typically entering through gaps at the foundation or under doors. Their size startles homeowners, but they’re not aggressive.

Cellar Spiders

These long-legged, delicate spiders build loose, tangled webs in basements, crawl spaces, and undisturbed corners. Cellar spiders thrive in low-light, high-humidity areas and can accumulate quickly when conditions favor them.

Grass Spiders & Funnel Weavers

Grass spiders build distinctive horizontal, funnel-shaped webs in lawns and shrubs. They occasionally wander indoors by accident, particularly in late summer and fall when vegetation near the foundation is disturbed.

Common House Spiders

These small, brown spiders build irregular, cobweb-style webs in undisturbed corners of homes, garages, and sheds. They’re responsible for most of the webs people find along ceiling lines and behind furniture.

Are Marshalltown Spiders Dangerous?

The vast majority of spider species in Iowa can’t deliver a medically significant bite. Most have fangs too small or weak to puncture human skin and won’t attempt to bite unless directly handled or trapped against the body.

Two species are considered potentially dangerous: the black widow and the brown recluse. Both are rare in Iowa. The brown recluse’s range technically extends into the state, but the species is uncommon in the upper Midwest. Black widows are identified by the red hourglass marking on the underside of the abdomen. If you suspect either species on your property, contact a spider exterminator rather than attempting removal yourself.