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As the weather cools, you might start noticing a few unexpected visitors creeping indoors. Many bugs and small critters start heading inside once temperatures drop, looking for warmth and shelter through the winter. It’s simply part of the season.
While most of these fall guests are harmless, they can still be a nuisance. No one wants to see something rushing across the kitchen floor on a chilly morning. Here’s a look at the most common fall bugs and what you can do to keep them outside where they belong.
Stink Bugs
Those shield-shaped bugs crawling on your walls? Classic fall visitors. Every year, stink bugs sneak indoors as the air cools, hunting for warmth and shelter.
They won’t bite or sting, but crush one and you’ll quickly learn how they got their name. These bugs are harmless but persistent, gathering near windows, light fixtures, and curtains until winter really sets in.
Boxelder Bugs
If you’ve noticed tiny black-and-red insects covering your siding or windows, congratulations — it’s boxelder bug season. They thrive after warm, dry summers.
Harmless but annoying, these bugs like to gather in sunny spots before slipping into your home to overwinter. Once they’re in, they’ll likely hang around until spring — so sealing cracks early can save you months of annoyance.
Ants
Just when you thought summer ants were gone, fall ones show up for crumbs and pet food. Carpenter ants are especially sneaky — when the chill sets in, they retreat deeper into your walls or wooden structures. A little kitchen cleanup and sealing up food containers will make them rethink their plans.
Cockroaches
Cooler air sends cockroaches hunting for warmth and moisture, usually straight into your kitchen or bathroom. These are the ultimate survivors, capable of multiplying fast once they find what they like. Keep things dry, seal cracks, and take out the trash regularly.
Spiders
Every fall, spiders start wandering inside in search of mates or a steady food supply (aka all the other bugs now living in your house). Most are harmless and even helpful. A quick vacuum or dusting around corners and windowsills can keep their numbers down.
Beetles
Lady beetles (often mistaken for ladybugs) and boxelder bugs love to wallow in the last warm rays of fall sun. You’ll often find them clustering on siding or sunny windows before sneaking into attics and walls. They won’t damage anything, but seeing dozens of them at once can feel overwhelming.
Silverfish
Fast, silvery silverfish thrive in damp, dark places like basements and bathrooms. They love paper, books, and even clothing, so if you’re spotting them, it might be time to declutter and run a dehumidifier.
Mice
While not technically bugs, they belong on this list. As soon as the temperature drops, mice start looking for a warm nesting spot, usually in your attic, basement, or pantry. A crumb here and a hole there is all the invitation they need. Keep food sealed, and check for tiny entry points along baseboards and vents.
