Skunks in Ontario

Overview

The striped skunk is a familiar Ontario backyard resident — and a low-grade but persistent problem when it dens under a deck, shed, or porch and treats the lawn as a grub buffet. Unlike raccoons and squirrels, skunks rarely get into the structure itself; the trouble is at ground level, in the crawl spaces and voids beneath outbuildings and decks, and in the pockmarked turf they leave hunting for beetle larvae. Add the well-earned reputation for spraying and a place on Ontario’s list of rabies carriers, and a skunk under the porch is a problem homeowners want handled carefully rather than confronted. Most people discover a skunk by the musky odour around a deck, fresh digging on the lawn, or a black-and-white silhouette crossing the yard at dusk.

Identification

Skunks are among the easiest wildlife to identify on sight: cat-sized, 2 to 5 kg, glossy black with the signature two white stripes running from head to tail. Their sign at ground level is just as distinctive, and easy to separate from the other common lawn digger, the raccoon.

The musky odour is the giveaway even without a full spray — a skunk denning under a structure leaves a lingering smell that a raccoon does not. Overnight lawn damage plus that odour points squarely at a skunk.

Life Cycle

Skunks mate in late winter to early spring, and females give birth in spring, typically to a litter of four to seven kits after about a two-month gestation. The kits stay in the den for weeks, dependent on the mother, before following her out to forage in mid-to-late summer. This spring denning-and-birthing period is the critical window for removal: sealing a den or excluding the adult without accounting for kits leaves them trapped underneath, where they die and create a far worse odour problem. Skunks generally live only a few years in the wild and will reuse a good den site if it’s left accessible.

Habitat & Behaviour

Skunks are nocturnal, mostly solitary, and poor climbers — which is exactly why they den at ground level rather than in attics. They seek out sheltered cavities under decks, sheds, porches, woodpiles, and debris, and they’ll take over an abandoned burrow or the space a groundhog dug. Slow-moving and near-sighted, a skunk relies on its spray for defence and gives clear warnings before using it: stamping its front feet, hissing, and raising its tail. A skunk that has this space and a nearby food supply has little reason to move on until the den is closed off.

Diet

Skunks are omnivores with a strong appetite for insects, and grubs are the draw that damages lawns — they dig for beetle larvae in the turf, especially after rain when the grubs are near the surface. They also eat other insects, small rodents, eggs, fruit, and, around homes, accessible pet food, green-bin waste, and fallen birdseed. Because grubs are the main lawn attractant, a yard with a heavy grub population is far more likely to attract skunk digging, and treating the grubs is a direct form of prevention.

Signs of Infestation

• A persistent musky odour around a deck, shed, or porch — the clearest sign of a den, even without a spray.
• Small, cone-shaped holes and flipped patches of sod on the lawn, appearing overnight, worst after rain.
• A skunk seen at dusk foraging or entering a space beneath a structure.
• A worn path or dug-out gap at the base of a deck, shed, or porch.
• Droppings containing insect parts near the den or feeding areas.

Damage Caused

Skunk damage is mostly to the yard and to peace of mind rather than to the building. Their grub-digging leaves lawns and gardens pockmarked with holes and torn sod, which can be extensive over a season in a grub-heavy yard. A den under a deck or porch brings a lingering musky odour, and if the skunk sprays — at a pet, a person, or in alarm — the smell is intense and slow to clear. Skunks don’t gnaw wiring or tear rooflines the way raccoons and squirrels do, so structural damage is minimal; the costs are turf repair, de-scenting, and exclusion.

Health Risks

Skunks are one of Ontario’s recognized rabies carriers, alongside bats, raccoons, and foxes. You can’t tell if an animal is rabid by looking, but warning signs include a normally-nocturnal skunk out and disoriented in daylight, uncharacteristic tameness, staggering, or aggression — any of which means keeping people and pets well back and reporting the animal, as our wildlife rabies safety guide details. The spray itself, while famously unpleasant, is not dangerous beyond temporary eye irritation, though it can trigger a strong reaction if it hits the eyes directly. Ensuring pets are up to date on rabies vaccination — a legal requirement in Ontario — is an important precaution in skunk country.

Seasonal Activity in Ontario

Skunks are active from spring through fall in Ontario and den up during the coldest stretches of winter without truly hibernating. Spring is the key season: females seek denning sites under decks and sheds to birth and raise kits, making it both the peak problem period and the most sensitive time for removal. Summer brings the most visible lawn digging as skunks hunt grubs, and juveniles begin foraging alongside the mother. Fall sees skunks feeding heavily to build fat reserves before winter. Suburban and semi-rural properties across Oshawa, Whitby, and the Lake Simcoe area — with decks, sheds, and grub-prone lawns — see the most skunk pressure.

Where They Hide

At ground level: under decks, porches, sheds, and outbuildings, in woodpiles and brush, and in abandoned burrows dug by groundhogs or other animals. Skunks favour a dark, enclosed, low space with a single defensible entrance, which is why the void beneath a deck or shed is such a reliable den site.

How They Enter Homes

Skunks don’t climb into structures — they get underneath them. They exploit or dig out gaps at the base of decks, porches, and sheds, and squeeze through openings in skirting or lattice. An existing gap where a deck meets the ground, or soil soft enough to dig under a shed, is all a skunk needs. The fix is a properly installed exclusion barrier that extends below grade so the animal can’t dig back in.

Prevention Tips

1. Treat a grub-infested lawn to remove the main food source that draws skunks to dig.
2. Once you’re sure no skunk or litter is present, seal under decks, sheds, and porches with heavy screening buried in an L-shape at the base.
3. Secure green bins and store pet food indoors; don’t leave food bowls out overnight.
4. Clean up fallen fruit, birdseed, and other accessible food.
5. Remove woodpiles, brush, and debris that provide ready-made shelter near the house.
6. Fix gaps in deck skirting and shed foundations before an animal moves in.
7. Keep pets’ rabies vaccinations current, as required in Ontario.

DIY vs. Professional Treatment

The honest trade-off with skunks is spray and timing. A homeowner attempting to trap or flush a skunk risks a direct spray, and during spring denning season, sealing a den without confirming there are no kits traps young underneath — turning a manageable problem into a serious odour situation. Ontario’s one-kilometre release rule also rules out relocating a trapped skunk far from the property. Professional removal confirms whether young are present, uses humane one-way exclusion so the skunk leaves on its own, and installs a dig-proof barrier so it can’t return — no confrontation, no orphaned litter. Sani IQ backs its wildlife exclusion work with the Pest-Free-Or-It’s-Free guarantee and provides an up-front quote after a quick inspection.

References

• City of Toronto — Skunks
• Ontario — Harass, capture or kill a wild animal damaging private property
• Government of Ontario — Rabies in Ontario

Last updated: July 16, 2026 · Reviewed by Sani IQ licensed technicians