The short version
Around Bismarck, queens start nests in May, and colonies peak in late summer. Small, low paper wasp nests can be handled at dusk. Leave wall, ground and high nests to a pro.
- Treat nests at dusk, when wasps are home.
- Never seal a hole wasps are using.
- Ground and wall nests are best left to a pro.
- Knock down small nests early in spring.
- Call 911 for breathing trouble after a sting.
Homeowners and renters in Bismarck with a nest near a door, deck or play area.
What to look for
Late-summer colonies are big and quick to sting. Near a door or deck, stings will happen. Wasps defend the area around their nest.
- 1Wasps disappearing into a hole in the lawn or a wall.
- 2Dead wasps collecting on interior windowsills in late summer.
- 3Wasps flying straight lines to and from one spot.
- 4Yellowjackets streaming from the ground after mowing or trimming.
- 5Multiple stings on one person during a single outdoor task.
- 6A soft or discolored patch of drywall with faint buzzing.
Why it’s worth acting soon
- Nests grow all summer.
- Ground nests get disturbed by mowing.
- Wall nests can chew through into rooms.
- Stings are dangerous for anyone allergic.
Treatment options and typical costs
Inspection and Nest Identification
$75–$200
Expect a pro to check eaves, vents, sheds and the ground. Multiple nests are common late in the season.
- Time
- 45–75 minutes
- Best for
- Every job; species and nest location decide the method
Preventive Spring Treatment and Follow-Up
$150–$400
Prevention won't stop every nest, and no honest company in Bismarck will say it does. It cuts the odds and catches nests that start early.
- Time
- 45–90 minutes
- Best for
- Homes with repeat nests or a sting allergy in the household
Aerial Nest Treatment and Removal
$100–$400
Bald-faced hornet nests, the grey football-shaped ones, defend aggressively and are best left to a Bismarck professional with a bee suit and a long-reach applicator. Small paper wasp combs are a simpler job.
- Time
- 30–90 minutes
- Best for
- Exposed paper wasp, hornet and bald-faced hornet nests
Sealing Up After the Nest Is Dead
$150–$450
Sealing is priced by the number and size of openings. One gap is quick; a row of open vents takes longer.
- Time
- 1–2 hours
- Best for
- Closing soffits, vents and gaps once a void nest is dead
Prices are typical published ranges. Ask what’s included before you compare quotes.
Yellowjackets often nest in old rodent holes and gaps in garden walls. Watch for wasps flying low and steady into one spot.Which wasps live around Bismarck.
They rarely sting. Mud daubers build tube-shaped mud nests. Bald-faced hornets build big gray nests in trees and eaves. They cause most stings. Eastern yellowjackets nest in the ground and in wall voids. They build open, umbrella-shaped combs under eaves and railings. Paper wasps are the most common around Bismarck.
Local wasps conditions in Bismarck.
A provider who works Bismarck and North Dakota every day can point out the specific conditions that matter most here, and getting the scope, price, and follow-up terms in writing makes it easier to compare options. Knowing Bismarck's seasonal timing lets you schedule treatment before the busy stretch rather than after it, which usually means faster service and a more accurate quote. An inspection in Bismarck usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Around Bismarck, the area is mostly suburban, so wasps pressure can differ from one block to the next depending on how tight the entry points are and how much food, water, or shelter is close by. Bismarck sits in a humid continental climate, and that sets the pace for wasp activity here: mid-summer through fall (July-October).
An unscreened foundation vent is an easy way in for a yellowjacket queen. Wasps flying in and out of a vent all day are a sign of a nest inside.When they’re most active.
Nests die back after the first hard freeze in fall. Early spring is the easiest time to remove small starts.
Where they nest around houses here.
Homes from Bismarck out to Mandan share the same favorite nest spots. A ground nest looks like wasps streaming from one hole. Watch for traffic in and out of gaps. Check eaves, attic vents and window frames. Plenty of homes in Bismarck have basements, but most nests are higher up.
A year of wasps in Bismarck.
- Spring: queens start new nests around May. Knock down small starts. - Summer: highs near 85°F in Bismarck help colonies grow fast. - Late summer: peak season. Workers hunt sweets near people. - Winter: lows near 2°F in Bismarck. Nests die; only queens survive.
Wasp, hornet or bee?
- Paper wasp: slim, long legs, open comb. - Yellowjacket: bright yellow and black, nests in the ground. - Hornet: larger, with a big closed paper nest. - Mud dauber: thin waist, mud tube nests. Rarely stings. - Honey bee: fuzzy and golden. about relocation.
If you get stung.
Move away from the nest first. Wash the sting and use a cold pack. An antihistamine can ease itching and swelling. 911 for trouble breathing or a swollen face or throat. If someone carries an epinephrine pen, use it.
Keeping wasps away from the patio.
- Food: cover plates and drinks outdoors. - Trash: keep lids tight and bins away from doors. - Fruit: pick up fallen fruit. - Spring checks: knock down small nests early. - Gaps: seal gaps after a nest is gone.
Ground nests: what to do.
Mark the hole with a flag. Keep kids and pets away. Don't mow over it. Don't pour gasoline or water in. Pros treat ground nests at night, when the colony is home.
A nest, or just visitors?
Wasps on flowers or trash cans may come from far away. A nest shows steady traffic to one spot. Watch at dusk, when they fly home. Follow the line back to an eave, vent, shrub or hole.
Treating a small nest yourself, safely.
- Only if it’s small, low and out in the open. - Never if anyone in the house is allergic. - Wait until dusk, when wasps are home and slow. - Wear long sleeves, pants and gloves. - Use a jet wasp spray from several feet away. - Never spray from a ladder. - Leave it overnight, then bag the nest.
Wasps and pets.
Dogs often snap at wasps and get stung on the face. Most stings just swell a little. your vet if the throat swells or breathing changes. Keep pet food and water bowls indoors in late summer.
Kids and wasps.
Teach kids to walk away calmly. Swatting makes a sting more likely. Check play sets, slides and playhouses for nests each spring. Use cups with lids for sweet drinks outside.
After the nest is gone.
Wasps don't reuse old nests. Seal the gap a wall nest used once it's quiet. Check nearby eaves for new starts. Knock down small new nests early next spring.
Wasps at picnics and barbecues.
- Drinks: use cups with lids or straws. - Food: keep it covered until you eat. - Trash: bag scraps and close the bin. - Calm: don’t swat; slowly move away. - Kids: teach them to walk away calmly.
Ground nests in the lawn.
Yellowjackets often nest in old rodent holes. Watch for wasps flying in and out of the grass. Mark it, and keep mowers and kids away until it's treated.
Questions to ask before you sign.
- What kind of wasp is it? - How will you treat a nest inside the wall? - Is removal of the dead nest included? - Is a return visit included?
What affects the price
- Preventive spring treatment bundled with removal.
- After-hours, weekend or emergency scheduling.
- Roof pitch and safe access to the nest location.
- Nest height and whether a ladder or lift is needed.
- Distance from the company's base and travel time.
- Sealing gaps after the nest is dead.
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What's your biggest concern about wasps?
When to call for help
Don't seal a hole wasps are using. They'll find another way in. Call for nests in walls, attics, the ground, or anywhere high. right away if anyone in the house is allergic.
What you can do yourself
Big, high or hidden nests are a job for a pro. Knock it down the next day. Spray it at dusk with a wasp aerosol. A small, reachable paper wasp nest is a fair DIY job.
Wasps in Bismarck
In Bismarck's neighborhoods, eaves, decks, play sets and shrubs are favorite nest sites. Winter lows near 2°F in Bismarck end the season; only new queens survive, tucked into sheltered spots. Bismarck only gets about 17 inches of rain a year, so local wasps often gather at pools, fountains and dripping taps.
Local research
Wasps in Bismarck, ND: what the public record shows
Before you compare quotes, it helps to know which wasps actually live in North Dakota, when they are busiest around Bismarck, and what the state figures look like. Everything below links to the agency or university page it came from.
Wasp species recorded in North Dakota
- Bald-faced hornet (Dolichovespula maculata) — Penn State: 'found in most of the 48 contiguous states and D.C., throughout Canada and in Alaska'; actually an aerial yellowjacket that builds the football-shaped gray paper nes…
- Native paper wasps (Polistes spp. (e.g., P. fuscatus, P. apachus, P. exclamans)) — Open umbrella-shaped nests under eaves, porch ceilings and railings. UC IPM: paper wasp colonies 'vary between 15 to 200 individuals'; Penn State: queens 'establish nests in May…
When wasps are busiest around Bismarck
Queens emerge in April–May, colonies peak August–October, and workers die at the first hard frosts; only new queens overwinter (OSU, Penn State, UMN).
Bald-faced hornet range per Penn State covers most of the 48 contiguous states and D.C. European paper wasp is reported less common in the Southeast and Great Plains (Penn State).
Rules that apply in North Dakota
For context, nationally
- 788 — Deaths from hornet, wasp, and bee stings, 2011–2021 (US). CDC MMWR
- 72 deaths per year — Average annual sting deaths, 2011–2021 (US). CDC MMWR
Sources: CDC MMWR; Baldfaced Hornet; Yellowjackets and Other Social Wasps (Pest Notes). Figures are quoted as the source prints them. How we check our sources
Simple ways to keep wasps away
- Hang wasp traps at the yard edge, not the patio.
- Pick up fallen fruit under trees promptly.
- Fill old rodent burrows and mulch-bed holes in spring.
- Fill gaps in retaining walls and stacked stone.
- Keep trash cans lidded and rinse recycling before binning.
In apartment buildings, one nest in a shared wall or balcony can affect several units. Let the building manager know so it gets treated once, properly.Did you know?
European hornets hunt at night and are drawn to porch lights
A bald-faced hornet is actually a yellowjacket, not a true hornet
Questions people ask
How do I find a good wasp control company?
Check that they're licensed in North Dakota. Ask how they treat hidden nests and whether removal is included.
Are wasps good for anything?
Leave nests that are well away from people. They eat caterpillars and other pests. Yes.
Wasp or bee: does it matter?
It matters because honey bees can often be relocated. Bees are fuzzy and rounder. Wasps are smooth and narrow-waisted.
Should I be worried about a nest in the ground?
Mowing over them sets them off. Ground nests are usually yellowjackets. Yes, if it's near a path or play area.
What should I do if I get stung?
An antihistamine helps with itching. 911 for trouble breathing or a swelling throat.
Is cost the main reason people leave wasp nests alone?
A small, early nest is often cheap to remove. More often the nest goes unnoticed or is hard to reach. Not usually.
When is wasp season in Bismarck?
Around Bismarck, queens start nests in May, and colonies peak in late summer. Nests die back after the first hard freeze in fall.
Are hornets common in Bismarck?
Bald-faced hornets are, in trees and on eaves. Most stings come from yellowjackets, though.
Nearby cities
Related guides
Sources (9)
The facts in this article come from the public sources listed above. Every home is different, so ask the company you talk to about pricing and what’s included. Published by Wasp Exterminator · Updated September 11, 2026 · How we write these guides