Spiders in Iowa

Spiders In Iowa (Infographic)

September 20, 2022

There are over 40 spiders found in Iowa. Most of them are harmless, with the exception of a couple. However, many people are often frightened by them because they don't know all the facts about spiders and they're unable to determine if the spider is venomous or not. Find out the differences between spiders found in Iowa.

Spiders in Iowa Infographic

10 Most Common Spiders in Iowa

Black and Yellow Garden Spider

As the name suggests, these spiders are identified by their black and yellow coloring. Females are 4 times larger than males and also display more dominant colors. Black and yellow garden spiders are found outside, typically in fields and gardens. They are most active during the daytime because they like sunny conditions with little to no wind. 

Common House Spider

Common house spiders are common in houses, sheds, and garages. They typically weave their webs where two edges are adjoined. For example, webs can be found in ceiling and window corners. These spiders can be found anytime of the year, but they are not venomous. They are typically brown in color to camouflage themselves.

Fisher Spider

Fisher spiders are one of the most common spiders found in Iowa. They do not need to make webs to catch their prey. Fisher spiders have better eyesight than most spiders, which allows them to track down their prey and pounce on it after they have found it. Although the fisher spider is not venomous, this spider bites.

Woodlouse Hunting Spider

The woodlouse spider is easily identifiable with red legs and a white abdomen. This spider can be found in piles of logs, rocks, leaves, bricks and other outdoor settings where it hunts pillbugs and rollie pollies.

Grass Spiders

Grass spiders are found in grass and foliage. They get their name from their webs found in the grass. These webs are especially visible in the early morning when they are covered in dew. As the spider grows in size, so does its web. Common colors found on grass spiders are black, brown, tan, and gray.

Yellow Sac Spider

The yellow sac spider is commonly spotted outdoors and they catch their prey in a silken tube or sac. If you spot one, it will probably be yellow or light tan in color. Be careful if you try to catch it, the sac spider can inflict a painful spider bite, but it is not venomous.

Wolf Spider

Wolf spiders are found outside in habitats of tall grass and shrubs. The habitat provides an abundant supply of insects. Similar to the fisher spider, wolf spiders do not use webs to catch their prey. The wolf spider is can bite humans. Although it is a venomous spider, it is not lethal.

Funnel Weaver Spider

This species is usually brown or gray in color with a pattern on their abdomen. Funnel weaver spiders are named after the unique web they weave, which is mostly flat, but falls towards one side to form a “funnel”. They are typically found in places that are hardly ever disturbed like attics, window wells or low shrubs.

Cellar Spider

Commonly mistaken for daddy-longlegs, the cellar spider has long, delicate legs and a light gray or tan colored abdomen. As the name implies, they are commonly spotted in cellars, basements or other dark and secluded areas. Cellar spiders’ irregular webs can be found on ceilings or in floor corners.

Orb Weaver Spider

There are many varieties of orb weavers so it can be difficult to know exactly which species you’re dealing with. The nocturnal spiders are brown or gray in color, but orb weavers that are spotted during the day consist of bright colors like yellow or orange. They’re usually found outdoors in gardens and fields.

2 Most Dangerous Spiders in Iowa

Black Widow

The black widow is one of the few venomous spiders found in Iowa. Fortunately, they are rare. They are found in close distance to man-made structures. Black widows will mostly be found on outdoor objects that have not been used for a long period of time, such as playground equipment or gardening materials.

Brown Recluse

Brown recluse spiders have a brown and gray abdomen. These spiders are typically found outside in piles of loose debris. If the spiders make their way inside, they are found in clothing or towels left on floors. These spiders are not aggressive in nature, however they are venomous.

Other Spiders Found In Iowa

Arrow-Shaped Micrathena Spider

American House Spider

Banded Garden Spider

Bold Jumping Spider

Comb-Clawed Spider

Cross Spider

Ground Spider

Labyrinthine Orb Weaver Spider

Lattice Orb Weaver Spider

Lang-Jawed Orb Weaver

Long-Legged Sac Spider

Metallic Crab Spider

North American Jumping Spider

Nursery Web Spider

Parson Spider

Putnam Jumping Spider

Red Spotted Ant Mimic Spider

Running Crab Spider

Running Spider

Shamrock Spider

Sowbug Killer Spider

Spined Micrathena Spider

Spiny Backed Orb Weaver

Spotted Orb Weaver

Tan Jumping Spider

Thin-Legged Wolf Spider

Trashline Orb Weaver

Triangulate Cob Web Spider

Tuft-Legged Orb Weaver

Venusta Orchard Spider

Woodland Jumping Spider

Des Moines Spider Removal

Is your home or business getting invaded with spiders? Preferred Pest Control is the solution to your problem! Visit our spider service page to find out how we can help you eliminate spiders, give us a call at (515) 415-5550 or schedule an appointment today.


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