The short version
Around Great Falls, 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.
Anyone in Great Falls dealing with wasps, hornets or yellowjackets at home.
What to look for
Near a door or deck, stings will happen. Wasps defend the area around their nest. Late-summer colonies are big and quick to sting.
- 1Wasps entering an attic vent, dryer vent or weep hole.
- 2Chewed, scarred wood on fences, decks or cedar siding.
- 3Open umbrella-shaped comb under a porch ceiling or railing.
- 4Wasps flying straight lines to and from one spot.
- 5Wasps disappearing into a hole in the lawn or a wall.
- 6Buzzing audible through a ceiling or wall on warm afternoons.
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
Not every buzzing insect is a wasp. Not every wasp is a threat. A careful look separates a lone paper wasp from a yellowjacket colony in Great Falls.
- Time
- 45–75 minutes
- Best for
- Every job; species and nest location decide the method
Sealing Up After the Nest Is Dead
$150–$450
Once the nest is dead, the gap gets sealed. Caulk, copper mesh or a soffit patch works. Old nests are not reused, but the gap invites new queens.
- Time
- 1–2 hours
- Best for
- Closing soffits, vents and gaps once a void nest is dead
Ground and Wall-Void Nest Treatment
$150–$500
Wall-void nests behind siding get the same dust treatment. In Great Falls, the pro should leave the opening unsealed until all traffic stops, since trapped wasps chew inward toward living space.
- Time
- 30–60 minutes plus a return visit
- Best for
- Yellowjackets in lawns, retaining walls, soffits and wall voids
Aerial Nest Treatment and Removal
$100–$400
A treated nest should go quiet within a day. A few stragglers are normal. Ask whether removal and a follow-up check are included.
- Time
- 30–90 minutes
- Best for
- Exposed paper wasp, hornet and bald-faced hornet nests
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 Great Falls.
Mud daubers build tube-shaped mud nests. They rarely sting. Paper wasps are the most common around Great Falls. They build open, umbrella-shaped combs under eaves and railings. Western yellowjackets nest in the ground and in wall voids. They cause most stings. Bald-faced hornets build big gray nests in trees and eaves.
Local wasps conditions in Great Falls.
Knowing Great Falls'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. A provider who works Great Falls and Montana 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. Great Falls sits in a semi-arid continental climate, and that sets the pace for wasp activity here: mid-summer through fall (July-October). In Great Falls, 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. An inspection in Great Falls usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first.
Yellowjackets sometimes nest in attics and wall voids, getting in through a torn vent screen or a gap in the soffit. Buzzing in a ceiling is worth a look.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.
Plenty of homes in Great Falls have basements, but most nests are higher up. Check eaves, attic vents and window frames. Watch for traffic in and out of gaps. A ground nest looks like wasps streaming from one hole.
A year of wasps in Great Falls.
- Summer: highs near 85°F in Great Falls help colonies grow fast. - Late summer: peak season. Workers hunt sweets near people. - Winter: lows near 13°F in Great Falls. Nests die; only queens survive. - Spring: queens start new nests around May. Knock down small starts.
Wasp, hornet or bee?
- 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. - Paper wasp: slim, long legs, open comb.
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.
- 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. - Food: cover plates and drinks outdoors.
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?
Watch at dusk, when they fly home. Follow the line back to an eave, vent, shrub or hole. Wasps on flowers or trash cans may come from far away. A nest shows steady traffic to one spot.
Treating a small nest yourself, safely.
- 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. - Only if it’s small, low and out in the open.
Wasps and pets.
your vet if the throat swells or breathing changes. Keep pet food and water bowls indoors in late summer. Dogs often snap at wasps and get stung on the face. Most stings just swell a little.
Kids and wasps.
Check play sets, slides and playhouses for nests each spring. Use cups with lids for sweet drinks outside. Teach kids to walk away calmly. Swatting makes a sting more likely.
After the nest is gone.
Check nearby eaves for new starts. Knock down small new nests early next spring. Wasps don't reuse old nests. Seal the gap a wall nest used once it's quiet.
Wasps at picnics and barbecues.
- 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. - Drinks: use cups with lids or straws.
Ground nests in the lawn.
Mark it, and keep mowers and kids away until it's treated. Yellowjackets often nest in old rodent holes. Watch for wasps flying in and out of the grass.
Questions to ask before you sign.
- How will you treat a nest inside the wall? - Is removal of the dead nest included? - Is a return visit included? - What kind of wasp is it?
What affects the price
- Nest height, and whether it needs a lift.
- Whether nest removal is included after treatment.
- Local labor rates and seasonal demand.
- Distance from the company's base and travel time.
- Exposed comb versus enclosed nest inside a wall or soffit.
- Return visit to confirm a void nest is dead.
📊
What's your biggest concern about wasps?
When to call for help
Call for nests in walls, attics, the ground, or anywhere high. right away if anyone in the house is allergic. Don't seal a hole wasps are using. They'll find another way in.
What you can do yourself
A small, reachable paper wasp nest is a fair DIY job. Spray it at dusk with a wasp aerosol. Knock it down the next day. Big, high or hidden nests are a job for a pro.
Wasps in Great Falls
Winter lows near 13°F in Great Falls end the season; only new queens survive, tucked into sheltered spots. In Great Falls's neighborhoods, eaves, decks, play sets and shrubs are favorite nest sites. Great Falls only gets about 14 inches of rain a year, so local wasps often gather at pools, fountains and dripping taps.
Local research
Wasps in Great Falls, MT: what the public record shows
Before you compare quotes, it helps to know which wasps actually live in Montana, when they are busiest around Great Falls, and what the state figures look like. Everything below links to the agency or university page it came from.
Wasp species recorded in Montana
- Western yellowjacket (Vespula pensylvanica) — UC IPM: 'the most commonly encountered species and is sometimes called the "meat bee"' in California and the Western states; ground and wall-void nester and aggressive scavenger…
- 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…
- European paper wasp (Polistes dominula) — Penn State: 'first reported in 1978 around Boston', now 'coast to coast ... although they are apparently less common in the Southeast and Great Plains'; nests in 'eaves of struc…
- 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 Great Falls
Western yellowjacket queens start nests each spring, colonies grow through summer and scavenge aggressively in fall before dying off; only fertilized queens overwinter (USU).
Bald-faced hornet range per Penn State covers most of the 48 contiguous states and D.C. Western yellowjacket is the dominant scavenging wasp of the Western states (UC IPM).
Rules that apply in Montana
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; Yellowjackets and Other Social Wasps (Pest Notes); Baldfaced Hornet; European Paper Wasp. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep wasps away
- Keep trash cans lidded and rinse recycling before binning.
- Store pet food indoors and clean bowls after meals.
- Hang wasp traps at the yard edge, not the patio.
- Fill gaps in retaining walls and stacked stone.
- Screen attic, gable and dryer vents with fine mesh.
- Caulk around cable, gas and conduit entry points.
A good wasp quote names the species, where the nest is, how it will be treated and whether taking it down or sealing the gap is included.Did you know?
Wasp nest paper inspired early experiments in making paper from wood
Some paper wasps can tell their nestmates apart by their faces
Questions people ask
What should I do if I get stung?
An antihistamine helps with itching. 911 for trouble breathing or a swelling throat.
Can wasps damage my house?
Yellowjackets in walls can chew through drywall. Carpenter bees do more wood damage. Rarely by much.
Are wasps good for anything?
They eat caterpillars and other pests. Leave nests that are well away from people. Yes.
Should I be worried about a nest in the ground?
Ground nests are usually yellowjackets. Mowing over them sets them off. Yes, if it's near a path or play area.
Why are there suddenly so many wasps in late summer?
Colonies are at their biggest by late summer. Food gets scarce, so workers hunt sweets and protein near people.
What's the usual way to get rid of a nest?
In Great Falls, a dust or spray into the nest opening at dusk, then removal once activity stops.
How often should you check your property for wasp nests?
Every week or two from spring through late summer. In Great Falls, look under eaves, decks, sheds and play equipment, where small nests are easy to deal with.
Are hornets common in Great Falls?
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