Winter Invaders to Watch Out For

Mouse in snow

You could call this time of year in Michigan “the dead of winter.” It certainly often feels that way, especially on one of its many dark, dreary days. Despite how it may look and feel outside, however, not everything really is dead. As you probably know, pests are nothing if not tenacious.

No matter how cold or dead the winter, pests will muddle on long enough to bother you. It would almost be inspirational, if it weren’t so annoying. Here are four pests that are probably trying to warm themselves up inside your home right now.

stink bugs

Stink Bugs

Stink bugs are infuriatingly common in Michigan. Part of the reason why they’ve managed to stick around is that they’re good at staying warm during winter. They do that by sneaking into people’s homes for shelter starting in early fall. Stink bugs congregate around windows and other warm places all fall. While they’re gathered, they find cracks and gaps around frames and siding. They use these gaps to work their way inside.

Inside, stink bugs enter a hibernation-like state called diapause for extended periods of time. While in diapause, the bugs remain completely immobile and don’t need food or water. In order to remain safe while in diapause, the bugs seek out hiding places. The stink bugs in your home may be in your walls, around your rafters, or in other secluded areas. They won’t hurt your home while they’re around, but they may produce their distinctive stink.

cluster flies

Cluster Flies

Cluster flies look a lot like common house flies, but they’re bigger, rounder, and slower. They may make a buzzing noise when they fly around. The name “cluster flies” refers to the flies’ tendency to cluster together in large numbers. Starting in late summer and early fall, they gather in groups to stay warm. As the temperature drops, they make their way into cracks and gaps around siding and awnings. Eventually, these cracks may lead them all the way inside.

Like stink bugs, cluster flies may enter prolonged periods of diapause after entering your home. These flies usually enter your home from high up, so they’re common in attics and rafters. You may find them around window or door frames, or near vents and utility lines. Cluster flies wake up during warm days to move around. They can’t hurt you or damage your property, though they may attract other pests like spiders. Cluster flies usually leave your home in spring.

rodents

Rodents

Rats and mice cannot hibernate. To survive winter, they need to find a warm place where they can access food and water. Rodents are very sensitive to temperature and pressure changes in the atmosphere. They begin infiltrating homes as soon as they sense fall approaching. Rats and mice squeeze through small gaps around window and door frames, utility lines, foundation, and siding. They find these gaps by using their acute senses to find drafts and follow the smell of food.

Rodents can’t fly like stink bugs or flies, so they usually end up in your basement. They’re attracted to any source of moisture or food. Rats and mice grind their teeth by chewing on a wide variety of soft materials. They can ruin boxes and fabric, damage furniture, or even cut electrical wires and start fires. Both rats and mice may reproduce indoors if given the chance. If you have a rodent infestation, you should deal with it fast!

boxelder bugs

Boxelder Bugs

Boxelder bug behavior is quite similar to stink bugs’. Starting in fall, they begin to gather around warm places. They’re particularly attracted to homes with southern and eastern exposure, for the sunlight. As they congregate, they may naturally slip into gaps and cracks around windows and doors. When winter comes, they will move further through the cracks to stay warm, eventually ending up inside. Boxelder bugs have very flat bodies that enable them to squeeze through tiny areas.

Boxelder bugs remain generally inactive during winter. They don’t reproduce inside and they won’t live long enough to survive winter. Boxelder bugs may emerge from their hiding places to sun themselves during warm days. When that happens, you may find them near windows or other warm areas. Boxelder bugs aren’t dangerous, but they may secrete a liquid that could stain surfaces when threatened or crushed. You may encounter more boxelders in early spring, as they begin to leave your home.


The reason why pests want to get inside your home over winter is so they can stay warm. The colder (and longer) the winter, the more desperate these four pests become. Believe it or not, however, you can turn that to your advantage.

Pests don’t have time to waste trying to break into a fortress this winter. If you can pestproof your place, you can keep pests away all season long. We want to help. If you have a pest problem this winter, give Griffin a call any time. We’re always happy to drive pests out of your home, no matter the time of year!

Snow Fleas: the Bugs in the Snow

Bugs in the Snow

Winter is a… divisive season. Chances are you either love it or hate it. Ok, chances are you either hate it or make up reasons to tolerate it (“It helps me appreciate the seasons,” etc.). Even if you’re firmly in camp “hate it”, however, you have to admit winter has its charms. Chief among these charms: you don’t have to worry about bugs! Or… *Pause for dramatic effect*… do you?

Imagine: You’re out walking your dog when you notice a cluster of weird black specs in the snow. You haven’t seen many horror movies, so you bend down to see what they are. Then they start jumping around! Yep, those things you just encountered are called “snow fleas”. Here’s everything you should know about them. It might not make you feel better, but at least you’ll be able to curse winter more accurately.

What Are They?

What are snow fleas?The so-called “snow flea” isn’t actually a flea at all. They’re actually several species of arthropod springtails in the Collembola order. The most commonly encountered snow flea around here is probably Hypogastruna nivicola. There are about 700 species of springtails in North America, and they all share certain key characteristics.

Snow fleas are tiny and very skinny. The ones you encountered were probably only 1 to 2 millimeters long! They’re probably black, dark blue, or dark grey, though they can also be a yellow color. They can’t fly, but they can rapidly leap 3-4 inches using a spring-like body part called a “furcula”. The most upsetting thing about snow fleas is probably how abundant they can be. During winter and early spring, you might spot literally thousands of the tiny arthropods congregating on snow.

How Are They Alive?

Snow fleas are capable of synthesizing an antifreeze-like protein that keeps their bodies from freezing. They automatically begin producing this protein when temperatures dip beneath a certain threshold.

When temperatures warm up, the protein easily breaks down, allowing snow fleas to survive comfortably in all seasons. Other species can produce antifreeze-like substances, but only snow fleas produce one that breaks down easily in warmth. This antifreeze, combined with their easily-satisfied diet, makes it possible for snow fleas to survive winter without much effort. In fact, snow fleas have been called one of the hardiest animals ever!

What Do They Want?

What do snow fleas want?Despite their unusual habits and habitats, snow fleas want what pretty much all pests want. When they come out on warm winter days, they’re looking for food, water, and a chance to mate. Springtails provide an important service to their ecosystems by feeding on microscopic bacteria, algae, and fungi.

Along with food, snow fleas are attracted to moisture. The tiny arthropod is very sensitive to drying out, and requires a consistent source of moisture to survive. Springtails use a tube-like organ called a “collophore” to suck up water from the wet surfaces they crawl over. They may seek out melting snow on warm days to take in moisture. Finally, snow flea mating season is in early spring. When large numbers of snow flea congregate together, it’s usually to produce offspring.

Are They Dangerous?

Not at all. Snow fleas can’t bite or sting, nor can they damage plants, food products, property, or clothing. In fact, springtails like snow flies are some of the many garden arthropods that are considered beneficial.

By feeding on decaying organic matter and the bacteria it produces, snow fleas help garden plants grow in spring. An abundance of snow fleas in your yard can be considered a sign of healthy soil.

What Can I Do About Them?

What can I do about snow fleas?We’re lucky snow fleas are harmless, because there’s not really a good way to control them even if we wanted to. The springtail will never come indoors, so you don’t have to worry about infestations. They’re attracted to moisture and decaying plant life, both of which are difficult to prevent in winter and spring.

Even if you shoveled up all the snow in your yard, wet grass and dead plants would bring snow fleas calling anyway. In fact, springtail species are quite abundant all year. Snow fleas become more noticeable in winter because they come out of cover and stand out against snow. When all the snow melts as spring arrives, you’ll stop seeing snow fleas as frequently. Until then, don’t worry about them–they’re kind of cute anyway. Uh… right?

If you had to choose a bug to deal with in winter, you could do a lot worse than snow fleas. The diminutive arthropods are totally harmless, non-invasive, and content to stay away from you. At worst, all they’ll do is ruin your view of endless expanses of snow. And we don’t know about you, but we’re tired of looking at that anyway.

Even though pests largely take some time off every winter, that doesn’t mean your pest control should. There’s still plenty good year-round pest control can do for you this season. Remember: prevention is always more effective than treatment. If you need some pest prevention (or treatment!) this winter, give Griffin a call anytime. We’re always happy to brave the cold for you.