Are There Scorpions in Boise, Idaho?

Yes, there are scorpions in Boise, Idaho. The species here is the northern scorpion, a small, tan arachnid that hides under rocks by day and hunts insects at night. Its sting hurts, but Idaho scorpions aren't considered a serious health risk for healthy adults.

Most people are surprised to hear it. Scorpions feel like an Arizona problem. But the Snake River Plain is high desert, and Boise sits right on its northern edge.

So if you live up against the foothills and just found something with pincers and a curled tail in your garage, you're not imagining things.

The northern scorpion (Paruroctonus boreus) is the scorpion Boise homeowners find. It's tan to olive brown and usually 1 to 2 inches long as an adult. Think "large cricket," not "movie monster."

It has eight legs, a pair of crab-like pincers up front and a segmented tail that curls over its back with a stinger on the tip. Younger ones are paler and almost see-through.

The northern scorpion has the most northern range of any North American scorpion, which is why it handles Idaho's cold winters just fine. A few other scorpion species turn up in the Pacific Northwest, but around the Treasure Valley this is the one you'll see.

Scorpions in Boise stick to dry, rocky, sagebrush ground. That's why homes on the foothills edge see them far more than homes on the valley floor near the Boise River.

Think about neighborhoods that back up to open ground. Places near Table Rock, the Military Reserve, Harris Ranch, Hidden Springs and Avimor all butt up against native foothills. So do homes on the Boise Bench rim and the open desert south of Kuna.

On the valley floor, with green lawns and wet soil from irrigation, scorpions are rare. They like it dry, warm and full of rock cracks. New subdivisions carved into the hills also stir them up, because grading flips over the rocks they live under.

No need to panic, but don't ignore it. A northern scorpion inside usually wandered in chasing bugs or looking for a cool, dark spot. One scorpion doesn't mean your walls are full of them.

Their sting feels a lot like a bee or wasp sting. You get sharp pain, some redness and swelling, and it fades. University of Idaho Extension notes that Idaho scorpions don't pose a significant threat to human health, except for people allergic to the venom.

Here's the thing, though. Harmless to most people isn't the same as welcome. Nobody wants to step on one barefoot on the way to the kitchen. If you're seeing them inside, it's a sign there's food and shelter right outside your walls, and Green Guard can help you keep them out.

Scorpions in Boise are most active on warm nights from late spring through early fall, with the peak in July and August. They come out after dark to hunt and hide again before sunrise.

Once the nights turn cold in fall, they slow down and tuck into burrows and rock cracks for the winter. That's also when a few wander toward warm garages and basements.

You'll rarely see one in daylight. If you do, it's usually because you moved the rock, board or pot it was hiding under.

The best way to keep scorpions out is to take away their food and their hiding spots near your house. Scorpions eat crickets, spiders and other bugs. Fewer bugs around your foundation means fewer reasons for a scorpion to hang around.

Yes, regular pest control helps by going after the bugs scorpions hunt and the edges they travel. We don't run a separate scorpion program. Our standard visit is a full exterior perimeter barrier treatment around your foundation, plus sweeping webs from the eaves and treating the garage.

That barrier targets crawling pests broadly. It knocks down the crickets, spiders and other insects that pull scorpions toward your house in the first place. Interior baseboard and crack treatments are available on request.

Our products are organic-based and family-safe, so kids and pets can be back on the lawn once things dry. If you're on the foothills edge and also seeing spiders, our spider control service and these tips on keeping spiders out of your garage cover a lot of the same ground.

Scorpions are cousins of the spiders you already know. In Boise, the arachnid you actually need to watch for is the black widow, whose bite is more serious than a scorpion sting. And if you're wondering about the other one people worry about, here's the truth on brown recluse spiders in Idaho.

You can also browse the full Green Guard pest library to identify what you're seeing.

Scorpions in Boise are real, but they're small, shy and not dangerous to most people. They show up where there's shelter and something to eat.

Cut down their hiding spots and the bugs they hunt, and they'll stay out in the sagebrush where they belong. Start with our $49 first service on a quarterly or bimonthly plan, and if pests come back between visits, so do we, free. Call (208) 297-7947 and let's keep them outside.