Bald-Faced Hornets Are Building Aerial Nests Across Ontario — June 2026 Alert

Quick answer: Bald-faced hornets are building grey, football-shaped paper nests across Ontario right now. In late June the nest is still small — often golf-ball-sized — making this the safest, cheapest time to remove it. These hornets sting repeatedly and can spray venom toward your eyes, so professional removal is the only sensible option. Sani IQ removes hornet nests from $245.

If you have spotted a small grey paper ball forming under an eave, on a branch, or against the side of your home this week, you are seeing the start of a bald-faced hornet colony. Across the GTA and cottage country, queens that overwintered are now founding new nests. The nest you can almost ignore today is the one that will dominate your backyard by August. In a well-run property, that is not something you watch grow — it is something you deal with while it is small.

What’s happening this week — and what to do

What are bald-faced hornets, and why are they showing up now?

Bald-faced hornets are a large black-and-white member of the wasp family, named for the ivory markings on their face. They build the iconic grey, papery aerial nest — and in Ontario, new colonies are founded in late spring and early summer, then grow through the warm months.

Right now the nest is small because the queen is still raising her first workers. That is precisely why this is the moment to act: a golf-ball-sized nest with a handful of hornets is a controlled job, while a late-summer nest is a different animal entirely.

How dangerous are bald-faced hornets?

More than most stinging insects people deal with. Unlike honeybees, which have a barbed stinger and can sting only once, bald-faced hornets have smooth stingers and can sting repeatedly. They are highly defensive of the nest and will chase a perceived threat over a distance.

According to pest-control authority Ehrlich, bald-faced hornets can even spray venom toward the eyes of an intruder — reportedly from several feet away — which can cause intense pain and temporary blindness. That single fact is why “knock it down yourself” is the wrong plan: you can be stung many times and partially blinded before you have moved ten feet.

Should I remove a bald-faced hornet nest myself?

Be honest about the trade. DIY removal of a hornet nest means standing within sting-and-spray range of an insect that defends its home aggressively, often at dusk, frequently up a ladder. The “savings” of a can of spray are measured against repeated stings, a possible eye injury, an allergic-reaction risk, and a nest that often survives a half-treatment and rebuilds.

For a homeowner who values their time and safety, the math is not close. A professional removes the nest in a single visit, with the right protective equipment and a guarantee. You get your backyard back without the risk. Book it and forget about it.

When is the cheapest time to remove a hornet nest in Ontario?

Now — early in the season, while the nest is small. A compact, early nest is a faster, lower-risk job than a mature one packed with defenders, and acting early avoids the peak-season rush. Sani IQ removes wasp and hornet nests starting from $245, with the final quote depending on nest size and access. Waiting until August rarely makes the job cheaper or easier.

What to check around your property this week

1. Eaves and soffits — the most common spot for a sheltered aerial nest.
2. Tree and shrub branches — look for a grey paper ball hanging in foliage.
3. Sheds, fences and play structures — quiet corners that queens favour.
4. Under decks and porch roofs — check overhead before anyone sits below.
5. Note, don’t poke — if you find a nest, mark its location from a safe distance and call a professional. Do not spray it, hit it, or seal an active entry.

Ontario localization: 2026 season

Across the GTA and Simcoe County, June and July are when new hornet and wasp colonies establish before summer activity peaks. Properties bordering trees, ravines and green space in Vaughan and Mississauga see the most aerial nests, and cottage-country homes in Muskoka are squarely in range. If you live near a wooded lot, this is the week to scan your eaves.

Why Sani IQ

Sani IQ is a licensed, science-based pest-control company serving Ontario, with 100+ five-star reviews and an integrated pest management approach. We remove wasp and hornet nests safely with the right protective equipment, treat the colony properly so it does not rebuild, and back our work with a “Pest-Free, OR It’s Free” guarantee. See our residential pest control service and transparent plans and pricing.

The bottom line

A bald-faced hornet nest is easiest, safest and cheapest to deal with when it is the size of a golf ball — which, in late June, is exactly what most of them are. Do not let it become a football. Call (705) 302-1887 or request a quote at our contact page, and have it handled while it is small.

Frequently asked questions

How big do bald-faced hornet nests get in Ontario? A new nest in late June may be golf-ball or orange sized, but a mature late-summer nest can reach roughly 60 cm tall — about the size of a football — and hold hundreds of hornets. That is why early removal is so much simpler than waiting.

Are bald-faced hornets more dangerous than wasps? They are more defensive of their nest than many wasps and can sting repeatedly. They are also reported to spray venom toward the eyes when threatened. Treat any active nest as a job for a professional rather than a DIY task.

Will a bald-faced hornet nest go away on its own? The colony dies off in late fall and the nest is not reused, but it grows aggressively all summer first. Leaving an active nest near your home means weeks of stinging risk, so removal is the practical choice rather than waiting for winter.

How much does hornet nest removal cost in Ontario? Sani IQ removes wasp and hornet nests starting from $245, with the exact price depending on the nest’s size and how accessible it is. Early-season nests are typically the most affordable to handle because they are small and lightly defended.

What should I do if I’m stung by a bald-faced hornet? Move away from the nest calmly, clean the sting site, and use a cold compress for swelling. Seek medical help immediately for any sign of an allergic reaction — trouble breathing, swelling of the face or throat, or dizziness — or if venom contacts your eyes.