Spooky Spiders in Utah: 5 Common Spiders & How to Keep Them Out

Halloween is right around the corner in Utah, and nothing sends shivers down your spine quite like a creepy, crawly spider! But we’re not talking about the fake decorations—you might have real spiders lurking in your home. With around 3,400 species of spiders in North America, it’s no surprise that some of them make their way indoors. While most are harmless, a few can pose a serious threat.
Let’s dive into the five most common spiders found in the Beehive State—including the two that are highly venomous—and learn how to keep them out of your home.
5 Common Spiders in Utah
1. Black Widow Spider
The black widow is one of the most feared spiders in North America, known for its venom that is 15 times more potent than a rattlesnake's. This spider is easy to recognize with its glossy black body and the iconic red hourglass marking under its abdomen.
Where They Hide:
- Tall grass and shrubs (summer)
- Garages, mailboxes, basements (winter)
Are They Dangerous?
Yes. A black widow bite can cause muscle aches, nausea, and difficulty breathing. Seek medical attention immediately if bitten.
2. Brown Recluse Spider
Another spider that gives Utah homeowners nightmares is the brown recluse. Identified by its violin-shaped marking, this spider has six eyes arranged in pairs instead of the usual eight.
Where They Hide:
- Gardens (summer)
- Dark, undisturbed areas like basements, attics, and trash cans (winter)
Are They Dangerous?
Yes. A bite from a brown recluse can cause necrosis (tissue death) and possible infection. Children are especially vulnerable. If bitten, seek medical help immediately.
3. Wolf Spider
With its large, hairy body and four large eyes, the wolf spider looks straight out of a horror movie! Unlike most spiders, wolf spiders don’t spin webs—they hunt their prey on foot, much like wolves.
Where They Hide:
- Basements, crawl spaces, doorways, and windows
Are They Dangerous?
No. Their bites may cause redness and swelling, but they are not venomous to humans.
4. Yellow Sac Spider
Yellow sac spiders are small, yellow or cream-colored, and often seen crawling on walls and ceilings at night. They are known to eat other spiders and small insects.
Where They Hide:
- Outdoors in warm months
- Indoors in fall and winter, seeking warmth
Are They Dangerous?
Not seriously. Their bites can cause itching, redness, and mild swelling that lasts a few days.
5. Huntsman Spider
The huntsman spider is one of the largest spiders in Utah, sometimes reaching the size of a dinner plate! With its crab-like legs and large, hairy body, it’s often mistaken for a tarantula.
Where They Hide:
- Under tree bark, rocks, and foliage
- Inside crevices and tight spaces
Are They Dangerous?
No. Their bites can cause redness and swelling but are not medically significant for humans.
How to Keep Spiders Out of Your Utah Home
Spiders might be fascinating, but you don’t want them taking over your house! The best way to prevent spider infestations is with perimeter pest control.
Protect Your Home with Ferta-Lawn’s Perimeter Pest Control
Ferta-Lawn’s highly effective perimeter treatment creates a barrier around your home to stop spiders, ants, wasps, earwigs, millipedes, roaches, and other household pests before they get inside.
Why Choose Ferta-Lawn?
- Expert pest prevention solutions
- Targeted treatments for year-round protection
- Safe and effective insecticides
Schedule Your Spider Control Service Today!
Don’t let spiders invade your home! Call Ferta-Lawn at 801-295-3057 or contact us online to schedule your perimeter pest control treatment today.
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