7 Pests Surging in Montreal Right Now — A June 2026 Field Report
Every June we put together a short field report based on what our trucks are actually seeing across Montreal and the South Shore. This year is unusual. Carpenter ants are at a fifteen-year high, wasps started two weeks early, and bed bugs are no longer concentrated in the boroughs we used to call hot spots — they are everywhere. Here is the rundown.
1Carpenter ants
Search volume for "fourmis charpentières" is up 314% above seasonal normal in Canadian Google data. We are seeing it on the ground too. Most of the calls right now are people noticing fine sawdust at baseboards or hearing rustling in walls at night. The colonies that overwintered are at peak activity. If you treat now, it is a $295 job. If you wait until August when wood damage starts, it is $700 plus repair.
2Wasps and yellow jackets
The wasp surge in our data starts late May and ramps into June, with the biggest weekly jumps in Ahuntsic-Cartierville (+28 points), Ville-Marie (+25), and Westmount (+23). Customers are finding nests at the edges of deck overhangs, in shed soffits, and under siding. June nests are still small and treatable in 20 minutes. By August they are large and aggressive.
3Bed bugs (still everywhere, but the geography is shifting)
Bed bugs are not new, but the borough distribution this June is different from last year. Sud-Ouest — particularly Saint-Henri and Pointe-Saint-Charles — has overtaken Verdun as the southwest-island hot zone. Ahuntsic has climbed steadily over the last six weeks. CDN is still chronic.
4Cockroaches (German specifically)
German cockroach calls are up in multi-family buildings with shared plumbing. The pattern is the same every summer — heat plus shared kitchen risers equals movement between units. The 24-month-old buildings in Ville-Marie that came online in 2024 are now showing infestations as their original sealing has aged.
5Mice (yes, still, in June)
The conventional wisdom is that mice are a winter problem. The conventional wisdom is wrong. June calls in NDG triplexes are running ~30% above last June. The driver is construction nearby — when a neighbouring building gets renovated, the existing mouse population scatters into adjacent buildings. The NDG triplex corridor has been heavily renovated in the last 18 months.
6Mosquitoes
Mosquito populations follow warm-wet weather patterns and the calls usually start in early June. We focus on perimeter treatment rather than yard fogging. The calls we get most this time of year are from property managers who want their condo grounds cleaned up before tenant complaints start.
7Wildlife — squirrels and raccoons in attics
Spring litters are now adolescents and they are looking for their own attics. South Shore wildlife calls have doubled compared to last June. Westmount and Outremont both had unusually mild winters this year, so the populations entering breeding season were larger than normal.
What to do if you are seeing any of these
If you are seeing one of these surges in your home, the practical advice has not changed: catch it in the first two weeks of activity. That is when single-visit treatments still work. By week six, you need multi-visit protocols and the costs roughly triple.
Same-day across Montreal and the South Shore
Carpenter ants, wasps, bed bugs, mice — we are dispatching every hour right now.