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10 Common Spiders in Utah (Pictures)

Spiders are a common, but sometimes unwelcome sight in Utah. These unique creatures are very helpful in controlling the bug population and are generally harmless. This article details the most common types of spiders you might see in Utah and gives details to help ease your mind the next time you see one of these fascinating creatures.

10 Common Spiders in Utah

1. Banded Garden Spider

Banded garden spider
Banded garden spider | by USFWS Mountain-Prairie via Flickr

Scientific Name: Argiope trifasciata

The banded garden spider gets its name from the bands or stripes adorning its long, ovular abdomen. As with most spider species, the females are larger than the males, with a leg span reaching up to one inch. The banded garden spider can be found in gardens and other areas with a lot of vegetation in Utah.

2. Utah Crab Spider

Utah crab spider
Utah crab spider isolated on white | image by Don Loarie via Flickr | CC BY 2.0

Scientific Name: Bassaniana utahensis

This unique spider can move sideways, which is why it is called the Utah crab spider. They vary in color but are typically darker with lighter spots and patterns. The front two pairs of legs are much longer than the rest, and the males are much larger than the females, measuring almost half an inch in length.

This species prefers to build webs between trees where they can blend in with the bark. Though they can bite if provoked, they do not pose any real threat to humans.

3. Woodlouse Hunter

woodlouse hunter spider on a rock
Woodlouse hunter spider on a rock | image by Mvuijlst via Wikimedia Commons | CC BY-SA 3.0

Scientific Name: Dysdera crocata

The woodlouse spider primarily feeds on woodlice. However, they do not build webs to catch the woodlice. They hunt for and attack their prey.

The larger females can be a little over half an inch long. Males and females are yellowish-brown and reddish-brown in color. The woodlouse spider is not venomous but will bite if cornered or provoked.

4. Hobo Spider

Hobo spider
Hobo spider | image by Géry Parent via Flickr | CC BY-ND 2.0

Scientific Name: Eratigena agrestis

The male and female hobo spiders look very similar, and the females are only slightly larger than the males, so they are not sexually dimorphic. This species is brownish red with a herringbone pattern on the abdomen.

The hobo spider can be found living in gardens, fields, and bushes of Utah. A hobo spider bite is unpleasant but doesn’t pose any real threat to humans.

5. Carolina Wolf Spider

Carolina wolf spider
Carolina wolf spider | image by codystricker via iNaturalist | CC BY 4.0

Scientific Name: Hogna carolinensis

The Carolina Wolf Spider doesn’t just call the Carolinas home. This spider can be found in other states across the US, including Utah. This species is quite large, measuring up to two inches long.

They are typically brown or gray in color. The Carolina wolf spider is a hunting spider, so it hunts and attacks its prey instead of building a web.

The female of the species carries her egg sac with her, and when it hatches, the babies crawl onto her back and remain there until they are ready to live on their own. Carolina wolf spiders are not great climbers, so they are more commonly found on the ground.

6. Western Black Widow

Western black widow
Male Western Black Widow | image by Alan Moore via Flickr | CC BY-ND 2.0

Scientific Name: Latrodectus hesperus

The female Western black widow is venomous and has a shiny black body with a large, round abdomen. They have a tell-tale red hourglass-shaped marking on the underside of their abdomen.

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The males are not quite as shiny or black and have a small red dot on their abdomen instead of an hourglass-shaped mark. The males only grow to be about one-third the size of the females. If bitten by a female Western black widow, it is recommended to seek medical attention as soon as possible.

7. Goldenrod Crab Spider

goldrenrod crab spider
Goldenrod crab spider

Scientific Name: Misumena vatia

The goldenrod crab spider is also known as the smooth flower crab spider. This species ranges in color from white to yellow but has the unique ability to change color over a few days to match its environment.

The goldenrod crab spider does not build webs to catch its prey; instead, it lies in wait in flower blooms and attacks insects seeking nectar. Unlike web-building spiders, the goldenrod crab spider has very good eyesight.

8. Bold Jumping Spider

Bold jumping spider on leaf
Bold jumping spider on leaf | image by Brian Tomlinson via Flickr | CC BY 2.0

Scientific Name: Phidippus audax

The small bold jumping spider is commonly found outdoors in Utah. This species is black with white markings. The bold jumping spider does not use webs to catch its prey.

Instead, it jumps on unsuspecting insects to catch and eat them. They move very quickly and erratically and can jump across distances of up to six inches.

9. Triangulate Cobweb Spider

Triangulate cobweb spider
Triangulate cobweb spider | image by u278 via Flickr

Scientific Name: Steatoda triangulosa

Like the common house spider, the triangulate cobweb spider is often found indoors in Utah homes. You may find these small creatures if you look around your window sills and lights or in quiet, undisturbed corners of areas such as garages and attics. This species is covered in tiny hairs and is yellowish-orange with yellow legs.

10. American Grass Spider

American grass spider on a leaf
American grass spider on a leaf | image by Judy Gallagher via Wikimedia Commons | CC BY 2.0

Scientific Name: Agelenopsis

The American grass spider, also known as the funnel-web spider, builds funnel-shaped webs in the grass, where it gets its name. This spider is unique because it sometimes uses a web to catch prey and, other times, chooses to hunt prey and drag it back to its funnel web. They are brown and tan with two dark lines along the top of the cephalothorax or head region.