Winter Pests 101

Winter Pests 101

January 25, 2020

Not all insects and animals hibernate during the winter months. Once the weather gets cold, some will seek out warmer habitats to hide out in. This often includes homes, which can be a source of warmth and food to them during the winter. 

Here are some of the most common winter pests and steps you can take to prevent an infestation.  


Rodents are well-known invaders year-round, but they are more likely to hide in your home in the winter. 


House mice are the most common rodent in the United States, and they have the word house right in their name. These critters are going to find dark and secluded places to make themselves at home. They are going to nest in places like attics and basements.

Mice can spread diseases as well as damage property by chewing on drywall and electrical wiring. To keep them out of your house, make sure to seal any cracks and holes on the outside of your home. It only takes a dime-sized opening for house mice to get in. 


Rats are another rodent you might find hiding in your home during the winter. Norway rats, also known as street or sewer rats, are found throughout the United States. Like mice, they enjoy nesting in basements. You might also find them in piles of debris.

Norway rats can cause a lot of damage to your home. They like to chew and burrow, which means they might gnaw through wiring, pipes and belongings or even cause damage to your foundation. They can also spread disease to you and your family. 

They only need a half-inch opening to get into your home, so make sure doors, utility lines and vents are properly sealed and maintained. As with house mice, keep an eye out for droppings and gnaw marks that could indicate presence rats in your house. 


Squirrels don't hibernate in the winter like you might think. They also are looking for warm places to spend the winter months. They are going to aim for attics and can enter your home through chimneys, construction gaps, damaged shingles and chewing through any weak points. If they manage to get inside your house, they will make themselves at home by building a nest and storing their food. They will wander outside during warmer days, though.

Similar to other rodents, squirrels can cause a lot of damage to your house. They will tear up insulation to use for their nests and chew through wiring, which can lead to fires. They can also pose a health hazard and spread disease. Make sure to inspect your home and look for any spots they could use to enter your home, sealing or fixing them.

Squirrels are bigger and more noticeable than rats and mice. You won't have to look for chew marks and droppings from them as you are probably going to hear them moving around in your attic space through thumping and scratching.

Insects and Bugs

While you might not see bugs as often in the wintertime, that doesn't mean they aren't around. Some of them are going to seek shelter in your house during the harsh winter months. 


German cockroaches are the most common type of cockroach worldwide. They will want to live in your home to be close to moisture and food. Plus, they can't survive in extremely cold temperatures, so they will be searching for some warmth. They can fit in small spaces and will often make their way into homes via bags and boxes. 

Because they like to be close to food and water, they are likely to be found in kitchen areas, such as sinks and cabinets, and around garbage containers. Having these insects in your home is a big cause for concern. Cockroaches can contaminate food and surfaces and spread bacteria and allergens around your home. They also reproduce extremely fast, which means a rapid, out of control infestation can happen. 

To try to keep German cockroaches from being attracted to your home, make sure surfaces and floors are clean from crumbs and food debris and take out your trash on a regular basis.


Brown recluse spiders can be dangerous to humans due to their venom. They are not something you want in your home. 

If a brown recluse gets into your home, it is most likely going to make its web in a place like a box, closet, attic, basement or crawl space. They are interested in undisturbed places. You also want to check any shoes that haven't been worn in a while in case any brown recluses are hiding in them. 

While it can be easy for spiders to get into your house, there are some steps you can take to reduce the chances. One important thing you can do is keep shrubs and trees trimmed away from your house, especially if there are any branches hanging over your roof. 

Other Animals

There are other, larger non-rodent animals that might invade your house in the winter. 


Raccoons are attracted by food and garbage and might enter your house through a chimney or attack. These large wild animals can cause property damage and are common carriers of rabies. 

To keep raccoons away, put trash cans in sealed areas like a shed or garage. Also, seal any points of entry they could use and put mesh over chimney tops. 


Opossums burrow under decks and porches and might also try to enter your home through a garage or attic. While they are usually docile animals, they can carry diseases that are transmittable to humans. 

If you want to prevent opossums from entering your home, seek out and seal any points of entry they might find around garages, basements and attics. 

Getting Rid of Winter Pests

If you find signs of winter pests in your home, contact MosquitoNix. Our professionals offer services like Rodent Control to help rid your home of invading pests.

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