As May rolls in with warmer days and blooming gardens, it also marks a significant shift in pest activity across Ontario, particularly in urban and suburban areas such as Toronto, Mississauga, Brampton, and Scarborough. The rising temperatures and increased moisture levels create an ideal environment for insects and rodents to emerge from hiding, begin nesting, and search for food and shelter, often within your home.
This month serves as a warning bell for homeowners: the earlier you act, the easier it is to prevent a full-blown infestation. Many pests, including ants, wasps, raccoons, and termites, initiate their breeding cycles in the spring, making May an ideal time for proactive pest control.
We specialize in understanding the seasonal behaviour of pests throughout the Greater Toronto Area. With years of experience and environmentally conscious solutions, we help homeowners stay a step ahead, offering timely, targeted treatments designed to keep your property protected before small problems become major headaches.
Common Pests Active in May
As temperatures rise, various pests become more visible and aggressive in May. Below are some of the most common troublemakers homeowners in Ontario may encounter this season:
Ants
Tiny but relentless, ants begin foraging in full force during May. Carpenter ants, in particular, can tunnel into wooden structures, causing silent yet costly damage. You’ll often spot long trails around windows, baseboards, and kitchen counters—especially if food crumbs are left behind.
Termites
May marks the peak swarming season for termites in many parts of the GTA. These destructive insects often go unnoticed until they’ve done significant damage. Termites create hidden nests in walls, foundations, and wood beams, silently compromising the structural integrity of your home.
Wasps
By May, queen wasps begin building new nests in roof eaves, attics, sheds, and wall cavities. As their colonies grow, wasps can become territorial and aggressive, posing a stinging threat to both children and pets. Early removal is key to avoiding a painful summer problem.
Bed Bugs
Though active year-round, bed bugs are more frequently transported during the spring travel season. These pests hide in mattresses, sofas, and cracks, emerging at night to feed on their prey. Their bites can lead to skin irritation, allergic reactions, and sleepless nights.
Rodents (Mice & Rats)
Mice and rats increase their activity in May as food sources become more abundant. They nest in walls, basements, and garages, often gnawing on electrical wiring and insulation. Their presence also brings serious health risks through contaminated droppings and surfaces.
Raccoons and Squirrels
These wildlife pests seek shelter in attics, chimneys, and crawl spaces as they prepare to raise their young. Raccoons can tear through shingles and vents, while squirrels chew on wires and insulation, causing potential fire hazards. Their nesting behaviour can lead to recurring damage if not addressed early.
Why Spring Invites Pests
Spring may be a season of renewal for nature, but for pests, it’s the perfect storm of opportunity. As temperatures rise and the air becomes more humid, insects and animals that lay low during the colder months begin to re-emerge, often with one goal in mind: survival and reproduction.
The shift in weather means more accessible food sources and moisture, two elements essential for pests like ants, termites, and rodents. Flowering gardens, open trash bins, and food crumbs indoors act like magnets, drawing them closer to your home. Even small sources of standing water can attract mosquitoes, while the smell of pet food or compost can lure raccoons and rats.
May is particularly important in the pest lifecycle. For many species, this month marks the beginning of swarming, mating, and nesting activities:
- Termites release winged swarmers to find new nesting locations.
- Wasps begin building their colonies from scratch.
- Rodents prepare nests in sheltered spots for their spring litters.
- Squirrels and raccoons raise their young in attics and crawl spaces.
Because of this surge in pest biology and behaviour, May often becomes the launching point for infestations that grow rapidly if left unchecked. Without early intervention, these invaders can establish themselves in walls, floors, and ceilings before you even notice their presence.
For homeowners across the GTA, understanding this seasonal trigger is key, because once pests find a home, they rarely leave on their own.
High-Risk Zones in Your Home
Pests don’t randomly choose where to invade—they target specific areas that offer warmth, moisture, food, or shelter. By identifying and securing these high-risk zones, you can dramatically reduce the chance of an infestation this spring.
Inside Your Home:
Kitchens and Pantries
Crumbs, spills, and improperly stored food attract ants, cockroaches, and rodents. Even pet food left out overnight can invite unwelcome guests.
Bathrooms and Laundry Rooms
These humid environments are ideal for silverfish, drain flies, and cockroaches. Leaky faucets and pipes provide a steady water source that keeps pests coming back.
Basements and Crawl Spaces
Dark, damp, and often cluttered—these areas are prime hiding spots for spiders, centipedes, mice, and even raccoons if entry points exist. Poor insulation or exposed vents increase the risk.
Outside Your Home:
Eaves and Rooflines
Wasps and hornets build their nests in sheltered spots along your roof edges or under gutters. Loose shingles or damaged vents are open invitations for wildlife, such as squirrels or raccoons.
Garages and Sheds
Pests like to nest in stored boxes, old furniture, and unused equipment. Rodents may chew through cardboard, while insects can hide in corners or between items.
Garbage Bins and Compost Areas
Unsealed garbage and compost piles attract flies, rats, raccoons, and more. The stronger the scent, the greater the risk, especially when bins are left near entry doors or windows.
Protective Actions You Can Take
The good news? You don’t have to wait for pests to become a problem. With a few simple, proactive steps, you can significantly reduce the chances of an infestation this May. Early prevention is the most effective and affordable way to protect your home before pests get too comfortable.
DIY Steps for Homeowners:
Seal gaps, cracks, and screens
Inspect doors, windows, vents, and foundation edges for tiny entry points. Use caulk, weather stripping, and mesh screens to keep insects and rodents out. Don’t forget to check around utility pipes and dryer vents.
Clean and declutter indoor spaces
Pests love clutter—it gives them places to hide and nest. Declutter basements, closets, and garages. Vacuum regularly, especially behind appliances and furniture, to eliminate food crumbs and insect eggs.
Manage food waste and pet food storage
Always store food in sealed containers and avoid leaving pet bowls out overnight. Remove garbage frequently and keep trash cans tightly closed, especially during warmer weather.
Yard care: trim bushes, remove standing water
Overgrown vegetation provides shelter for raccoons, rodents, and insects. Trim shrubs away from walls and clear leaves from gutters. Empty birdbaths and flower pot trays to prevent mosquito breeding.
Tip: Start early in the month for best results
Pest prevention is most effective when infestations are prevented from taking hold. Tackling these tasks in early May can make all the difference as pest activity surges with the season.
Signs It’s Time to Call the Professionals
While DIY prevention is a great start, some pest situations require immediate expert attention. If you notice any of the following red flags, it’s time to contact our professional pest control service before the issue escalates.
When infestations persist or grow
If pests keep returning despite your best efforts, it’s a sign they’ve established a hidden nest or colony. This is especially common with ants, bed bugs, and rodents, which multiply quickly and adapt to over-the-counter treatments.
If pests cause property damage
Chewed wires, gnawed wood, torn insulation, or stained walls are serious indicators, especially when caused by rodents, termites, or raccoons. These pests don’t just invade—they destroy.
Unusual droppings, sounds, or nests
Hearing scratching in the walls or attic? Noticing unfamiliar droppings in cupboards or along baseboards? Spotting shredded paper or insulation bunched up in corners? These are classic signs of active infestation.
Wildlife sightings inside the property
Seeing a squirrel in your attic or a raccoon in your garage isn’t just a surprise—it’s a threat to your home’s safety. Wildlife can carry disease and cause significant structural damage.
Multiple pests appear at once
If you’re dealing with more than one type of pest—say, ants in the kitchen and mice in the garage—it’s likely your home has multiple vulnerabilities that need professional assessment and treatment.
FAQs
How do I know which pest I’m dealing with?
Look for signs like droppings, nesting materials, chewed wires, or insect trails. You can also pay attention to when and where the activity occurs—day vs. night, indoors vs. outdoors. Still unsure? Pestong offers free inspections to help accurately identify the pest and recommend the best treatment.
Is May too early to treat summer pests?
Not at all. In fact, May is the perfect time. Many pests begin nesting and breeding in spring, so early treatment helps prevent full infestations by summer. Addressing the problem now means fewer visits and longer-lasting results.
Are Pestong’s treatments safe for kids and pets?
Yes. Pestong uses eco-friendly and family-safe products designed to target pests, not people or pets. Our technicians also provide clear post-treatment instructions to ensure your space remains safe and comfortable for everyone.
How long does treatment last?
The effectiveness depends on the pest and treatment type, but most services offer protection for several weeks to months. Pestong also offers follow-up treatments and preventive maintenance plans for year-round protection.
