5 Signs You Have a Wasp Nest in Your Yard (And What to Do)

Early Detection: The Best Way to Prevent Wasp Problems

By the time you see a swarm of wasps in your Maple Ridge yard, the nest has likely been there for weeks. The key to avoiding painful stings and expensive removal is catching the nest early — ideally in spring when the colony is still small and the queen is the only one building.

Here are the five telltale signs that a wasp nest is taking shape on your property, and exactly what to do when you spot them.

Sign #1: A Single Wasp Flying Repeatedly to One Spot

In early spring (April through May), a lone queen wasp or a few pioneer workers will fly back and forth from a specific location — under your eaves, along your fence line, or near your garden shed. If you notice a wasp returning to the same spot again and again, she’s either scouting for a nest site or in the early stages of building one.

What to do: This is your window of opportunity. A single queen’s nest is small — golf-ball sized — and can often be knocked down with a long broom handle or hose spray (from a safe distance). Wear protective clothing, do it at dusk, and check again the next day. If she rebuilds, it’s time to call a professional.

Sign #2: Unexplained Small Holes in Your Lawn or Garden

Yellow jackets are ground-nesting wasps. They often take over abandoned rodent burrows or dig their own small entrance holes in garden beds, under shrubs, or along retaining walls. These entrance holes are about the size of a quarter (2–3 cm in diameter) and may have fine, sandy-looking soil around the opening where the wasps have excavated.

What to do: Do NOT block the hole. Mark the location from a safe distance and call a pest control professional. Ground nests can be large — some extend a metre into the ground — and disturbing them will provoke a swarm. Professional treatment involves applying insecticidal dust into the entrance, which the wasps carry deep into the colony.

Sign #3: A Papery Nest Under Your Eaves or Porch

The classic sign — a grey, paper-like comb hanging from an eave, porch ceiling, window frame, or fence post. Paper wasp nests start small (about the size of a ping-pong ball) in spring and grow to the size of a dinner plate by July. The nest has open hexagonal cells on the bottom where larvae develop. As the summer progresses, you’ll see more wasps crawling over the surface.

What to do: Assess the location. If the nest is in a low-traffic area and you can safely avoid it, you may choose to leave a small paper wasp nest until winter (wasps abandon nests in fall and don’t reuse them). But if it’s near a doorway, window, patio, or play area, removal is recommended. For nests above head height or near high-traffic zones, call a professional.

Sign #4: Chewed Wood Damage on Fences and Decks

Wasps build their paper nests from chewed wood fibres. If you notice thin, light, blistered-looking streaks on the surface of your wooden fence, deck, or untreated siding — especially in spring and early summer — you may have paper wasps or hornets collecting construction materials nearby. The damage is usually superficial but is a clear indicator that a nest is being built somewhere close.

What to do: Follow the flight path of the wasps you see leaving the damaged area. They’ll fly directly back to their nest site. Treating the wood with a sealant or stain can reduce the appeal for wasps, but the nest itself still needs to be addressed.

Sign #5: Wasps Around Your Garbage, Compost, or Outdoor Dining Area

This isn’t a sign of a nest on its own, but when combined with the other signs, it confirms you have an active colony nearby. In late summer (July through September), worker wasps switch from feeding larvae to foraging for sugars and carbohydrates. That’s when they become a nuisance around garbage bins, compost piles, fruit trees, recycling containers, and outdoor tables.

What to do: Observe where the foraging wasps go. Their flight path will lead you back to the nest entrance. Follow it from a safe distance (stay at least 10 metres away). If you can’t locate the nest, a pest control professional can track them during an inspection.

What to Do If You Find a Wasp Nest

Your next steps depend on the nest size, location, and species:

Nest Type	Size	Action
Paper wasp (exposed comb, eaves)	Small (< golf ball)	Knock down at dusk with long pole
Paper wasp (exposed comb, eaves)	Large (> tennis ball)	Call professional
Yellow jacket (ground nest)	Any size	Call professional — do not DIY
Yellow jacket (wall void)	Any size	Call professional — risk of inside infestation
Hornet (high tree)	Any size	Call professional
Hornet (attic/eave)	Any size	Call professional

Prevention: Stop Nests Before They Start

The best way to handle wasp nests in July is to prevent them from establishing in the first place. Here’s a simple spring checklist:

• Inspect your property in April — look for early-stage nests under eaves, in sheds, and along fences
• Seal gaps — caulk cracks around windows, doors, siding, and rooflines
• Remove food sources — keep garbage cans sealed, pick up fallen fruit, and cover compost
• Install wasp traps in early spring to catch queens before colonies form
• Schedule a preventive spring treatment with your local pest control company

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Canadian Pest Control is a locally owned and operated pest management company serving the Fraser Valley since 2012. Fully licensed, insured, and committed to safe, effective pest control for your home and family.