Wasps aren't always obvious at first. Colonies start small in spring, and it often takes a few weeks before the signs become visible to the average homeowner. Here are five things to look and listen for (and when it makes sense to bring in a wasp control professional).
One or two wasps passing through your garden is normal, especially in summer when they're hunting for food.
What signals an infestation is repeated activity concentrated around a single spot. If you keep noticing wasps flying in and out of the same gap in your siding, the same corner of your shed, or the same patch of mulch, there's a good chance a nest is nearby.
Pay attention to the time of day, too. Wasps are most active during daylight hours, so early morning or late afternoon is often the easiest time to spot a pattern.
The most direct sign of a wasp infestation is the nest. Depending on the species, a wasp's nest might look like a papery, upside-down umbrella under an eave, a rounded gray ball tucked into a tree. It also may not be visible if the wasps have built a nest underground or inside a wall cavity.
Common places to check include:
Early-season nests are often small, sometimes no bigger than a golf ball, which makes them easier to miss. Checking your property in spring, before the colony has time to grow, gives you the best chance of catching an infestation early.
Need more help identifying the nest? Check our page: Wasp’s Nest: Signs and Removal.
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There is a wealth of common spaces where wasps like to nest inside your home – wall voids, shutters, and eaves being among the most popular. If they have built a nest inside a wall void or attic space, you may hear a faint but steady buzzing sound.
This is especially common with yellowjackets, which frequently nest in enclosed spaces like wall cavities or underground burrows rather than out in the open. A buzzing sound coming from inside your home is worth taking seriously.
Trying to inspect or treat a nest inside a wall on your own can disturb the colony and increase the risk of stings, so this is a good moment to bring in a wasp control technician rather than investigating further yourself.
Wasps chew wood fibers to build their nests, and this process can leave small clues behind. Look for:
None of these signs is as conclusive as spotting the nest itself, but combined with wasp sightings, they can help confirm what you're dealing with.
Wasps tend to become more defensive the closer you get to their nest. If you find that wasps seem unusually aggressive in one part of your yard, hovering close to your face or following you for a few feet as you walk past, that's often a sign that a nest is nearby, and the colony feels threatened.
This kind of behavior tends to intensify as summer progresses and colonies grow larger: A study from the National Institute of Health has noted that encounters with stinging insects and related injuries rise notably during late summer and autumn, when nests are at their largest and most active. They call this “yellowjacket delirium”.
If wasps in a specific area seem more territorial than usual, it's best to keep your distance and avoid the area until it can be properly assessed.
If you've noticed one or more of these signs, avoid approaching the nest or attempting to treat it yourself. Our wasp control team can inspect your property, confirm the species and nest location, and recommend a treatment plan suited to your situation.
Wasps look for easy access to food and shelter. Open trash cans, sugary drinks, ripe fruit, and gaps around windows, doors, or eaves can all draw them in and encourage a wasp home to form nearby.
If you keep finding wasps in the house, there's likely a nest close by, possibly in a wall void, attic, or vent. Wasps often use small gaps as a route indoors while foraging or expanding their colony.
For minor wasp issues, sealing entry points and removing food sources can help. If you've found a nest or keep seeing wasps indoors, our wasp control services team can assess and manage the situation with minimal risk.