15-20 mm – Black and white
Insect – High risk
White-spotted wasp
The white-spotted wasp is one of Quebec’s most imposing wasps. Its black coloring with ivory-white spots immediately distinguishes it from other species. It builds large aerial nests and is considered one of the most aggressive wasps in North America.
§1Distinctive features
How to identify it
A large wasp, 15 to 20 mm long, with black coloring and creamy-white spots on its head, thorax and abdomen. Its nest is characteristic: white or light-gray envelope, suspended in trees.
§2Habitat
Where to find it
Nests in trees, shrubs and sometimes under eaves or bridges. Prefers wooded areas and gardens with dense vegetation.
§3Reproduction
Lifecycle
Without intervention, an infestation can double in size in just a few weeks.
§4What to look out for
Signs of infestation
- Large white ovoid nest suspended in the trees
- Black and white wasps in flight
- Intense aggression if nest is approached
- Loud buzzing around the nest
§5Why act fast
Risks
- Multiple very painful stings
- Severe, life-threatening allergic reactions
- One of the most intense defensive aggressiveness in wasps
§6Prevention
How to avoid it
- Never approach the nest
- Inspect vegetation in early summer
- Contact a professional immediately
- Wear full protection when working in the vicinity
§7Pro method
How MW works
Inspection
Home location and assessment.
Preparation
Customized plan – pre-intervention measurements.
Treatment
Locate main and satellite nests, treat with non-repellent baits.
Follow-up
Inspection visit – written guarantee.
§8We answer you
Frequently asked questions
What's the difference with the Eastern wasp?
These are often the same species (Dolichovespula maculata). Both names refer to the same insect, depending on the region.
Can they smell fear?
No, but they are very sensitive to vibrations and sudden movements, which trigger their defensive behavior.
Can an empty winter nest be preserved?
Yes, an empty winter nest can be removed and kept as a natural curiosity. It will not be reused.
React quickly, sleep well.
The longer the infestation lasts, the more expensive it becomes.