When Pests Invade

Fall Invaders: The Top 7 Household Pests to Watch Out for in the US and Canada After August


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As the warm and lively days of summer begin to wane, the cool embrace of fall takes over, bringing not just a change in weather but also a shift in the behavior of household pests. This seasonal transition marks a time when many creatures, from tiny insects to larger rodents, seek refuge in our homes, preparing for the colder months ahead.

Being vigilant about seasonal pest trends is not just a matter of comfort; it’s a critical part of maintaining a healthy and hygienic living environment. The very same creatures that enjoy the great outdoors during the summer months can become unwelcome invaders in our living spaces. Understanding their patterns and taking timely action can mean the difference between a peaceful autumn and a pest-ridden nightmare.

In this comprehensive guide, we’ll delve into the top 7 household pests to watch out for in the US and Canada after August, including rodents, stink bugs, bed bugs, cockroaches, spiders, ants, and pantry pests. We’ll explore why they become more prevalent, offer insights into prevention, and provide actionable tips to keep your home pest-free this fall. So grab a cup of your favorite autumn beverage, and let’s begin our journey into the world of seasonal pest control.

Section 1: Rodents

Common Species:

  • House Mouse: Small and nimble, often found in kitchens and pantries.
  • Norway Rat: Larger and more aggressive, typically found in basements or garages.
  • Roof Rat: Known for nesting in high places like attics.

Rodents such as mice and rats are notorious for seeking shelter indoors as the fall season approaches. The dropping temperatures drive them to find warm and cozy spots, often within the hidden corners of our homes. From garages to attics, rodents can infiltrate and cause significant damage.

Find out more about rats and mice in our comprehensive post

Prevention and Control Tips:

  • Seal gaps and cracks that may serve as entry points.
  • Store food in airtight containers.
  • Use traps or professional services if an infestation is detected.

Section 2: Stink Bugs

Common Species: Brown Marmorated Stink Bug, Green Stink Bug, Southern Green Stink Bug

  • Brown Marmorated Stink Bug: Most common home invader in North America.
  • Green Stink Bug: Found in gardens and sometimes homes.
  • Southern Green Stink Bug: Primarily an agricultural pest but may enter homes.

Known for their distinct odor, stink bugs can be a real nuisance during the fall. They overwinter inside homes, hiding in walls or attics. Their presence is particularly common in the Eastern United States.

Keeping Them Out:

  • Inspect and seal any cracks around windows and doors.
  • Vacuum regularly but carefully, as crushing them releases their odor.

Section 3: Bed Bugs

Common Species: Cimex lectularius (Common Bed Bug)

  • Note: Most bed bug infestations in homes are caused by the common bed bug, Cimex lectularius.

The end of summer travel might bring more than just memories; it could also mean bed bugs. These tiny parasites are experts at hitchhiking, moving from hotels to homes.

Detection and Management Tips:

  • Check luggage and clothing after traveling.
  • Consider professional extermination if an infestation is found.

Find out more about bedbugs in our introduction post

Section 4: Cockroaches

Common Species of roaches:

  • German Cockroach: Most common in homes, attracted to moisture.
  • American Cockroach: Often found in basements or sewers.
  • Oriental Cockroach: Known for its strong, unpleasant odor.

The fall season may witness an increase in cockroach activity indoors. Seeking warmth, these resilient pests can find their way into even the cleanest homes.

Prevention and Eradication Recommendations:

  • Keep kitchens and bathrooms clean and dry.
  • Use bait traps or contact a pest control professional if needed.

Get informed on how to manage cockroaches in your home

Section 5: Spiders

Common Species: Common House Spider, Wolf Spider, Brown Recluse

  • Common House Spider: Often found in various rooms, generally harmless.
  • Wolf Spider: Hunts on the ground, may be found near doors.
  • Brown Recluse: Venomous and requires caution, found in dark, secluded areas.

Certain spider species become more active and visible in the fall. While most are harmless, their presence can be unsettling.

Handling and Prevention Guidance:

  • Know how to identify venomous species in your region.
  • Keep areas clear of clutter to minimize hiding spots.

Section 6: Ants

Common Species: Carpenter Ants, Pavement Ants, Odorous House Ants

  • Carpenter Ants: Can damage wood, often found in damp areas.
  • Pavement Ants: Nest under sidewalks and can enter homes.
  • Odorous House Ants: Known for their unpleasant smell when crushed.

From carpenter ants to sugar ants, these tiny invaders can become a big problem during the fall, especially if they find a food source.

Controlling Infestations Strategies:

  • Clean up food spills promptly.
  • Use ant baits or call in professionals for large infestations.

Section 7: Pantry Pests

Common Species: Indian Meal Moth, Saw-Toothed Grain Beetle, Rice Weevil

  • Indian Meal Moth: Found in stored grains and dry goods.
  • Saw-Toothed Grain Beetle: Common in packaged cereals and pasta.
  • Rice Weevil: A serious pest of stored rice and other grains.

Moths, beetles, and other pantry pests can find their way into your stored food products. This is not just a fall problem but can become more noticeable as holiday cooking begins.

Detection and Handling Advice:

  • Store grains and dry goods in sealed containers.
  • Regularly inspect pantries and discard infested items.


As the seasons change, so do the challenges we face in keeping our homes comfortable and pest-free. Understanding the habits and tendencies of common household pests can empower us to take proactive measures, ensuring a more harmonious living environment. From the scurrying of mice to the subtle invasion of pantry moths, each pest presents unique concerns and calls for tailored strategies.

Whether you’re dealing with rodents, stink bugs, bed bugs, cockroaches, spiders, ants, or pantry pests, staying informed is the first step to successful pest control. We hope this comprehensive guide has equipped you with the knowledge and tools you need to tackle these seasonal invaders.

If you’re looking for more insights on general household pests, don’t miss our Ultimate Guide to Household Pests. There you’ll find a wealth of information on identifying, preventing, and managing pests throughout the year.

Stay vigilant, stay informed, and keep those unwanted guests at bay. Remember, the team at Pest Pilots is always here to help guide you through the often-unseen world of household pests. Bookmark our blog and follow us on social media to stay up-to-date with the latest tips, trends, and solutions in pest control.

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