Is it safe to seal the hole where wasps are going into my wall?
Sealing is the last step, never the first. A New Haven provider dusts the void, leaves it open so returning foragers carry the product inside, and comes back to confirm the colony is dead. Once it is quiet, the New Haven entry gets sealed so next year's queen cannot use it.
Why are there suddenly so many wasps in late summer?
Colonies peak in August and September, and the workers change jobs. With no more larvae to feed, the sugar reward they got from the brood disappears, so New Haven yellowjackets go looking for soda, fruit and picnic food. Numbers around a New Haven home look higher because foragers are everywhere at once.
Should I be worried about a nest in the ground?
Yes, more than most other nests. Ground yellowjacket colonies around New Haven are large by late summer, sit right where feet and mowers go, and respond to vibration with a mass attack. Mark the entrance, stop mowing that section of the New Haven yard, and have it treated.
Are wasps dangerous to my pets?
Yes, especially dogs that snap at flying insects or dig at a ground nest in the New Haven yard. One sting is painful; several, or one inside the mouth, is a veterinary emergency for New Haven pets. Keep pets indoors while a New Haven provider treats the nest and for a day afterward.
Are wasps good for anything, and should I leave beneficial ones alone?
Yes. Solitary wasps such as mud daubers and cicada killers almost never sting and can be left alone anywhere on a New Haven property. Social wasps that defend a nest are the ones to weigh, and the deciding factor for New Haven homeowners is distance from daily activity, not whether the wasps are beneficial.
How common are wasp sightings?
Very common where wasps are established. Worth knowing before you call anyone in New Haven: if wasps seem to be everywhere on your property, you are not alone: 67% of New Zealand respondents in the Moths and Butterflies of New Zealand Trust's 2025 survey saw them frequently, though that is an overseas habitat figure, not a home infestation rate. For a property in New Haven, the next step is an inspection that identifies the source, not a guess based on national averages.
Do wasp traps actually work?
Another data point for New Haven readers: Twenty-three percent of respondents to the Moths and Butterflies of New Zealand Trust's 2025 wasp survey reported using traps, the second most common method in an opt-in New Zealand sample that describes what people tried rather than what worked. New Haven homeowners comparing quotes should ask each provider which of these patterns they see locally and why.