The short version
Getting rid of fruit flies in Cody, Wyoming means finding whatever is fermenting indoors, because the state grows almost no commercial fruit and the dry air pulls flies toward drains, bar mats, and kitchen scraps. Clear those sources, then trap the survivors for about two weeks. Activity peaks from August to October, but an indoor source can keep flies going in any month.
- Wyoming reports no commercial fruit or vegetable crops, so Cody fruit flies nearly always start indoors.
- With 11 inches of yearly rain, damp drains and ice bins are the easiest breeding spots to find.
- Spotted wing drosophila is confirmed in only four Wyoming counties: Fremont, Goshen, Laramie, and Platte.
- Restaurants and bars answer to Wyoming Consumer Health Services inspections.
- If traps still fill after two weeks of cleanup, a hidden source needs a professional search.
This page is for Cody homeowners and renters seeing small flies near fruit, sinks, or trash, and for people running kitchens, bars, lodges, and short-term rentals along the Yellowstone east gateway route. If you grow cherries, plums, or raspberries in a backyard and found larvae in the fruit, the spotted wing drosophila section is for you too.
What to look for
Two flies matter in Cody. The everyday one is Drosophila melanogaster, the vinegar fly, roughly 1/8 inch long with a tan body and red eyes. It needs fermenting sugar and moisture, and in a town with 53 percent average humidity and very little rain, moisture is the scarcer of the two. That is why Cody infestations cluster around kitchen sink drains, garbage disposals, ice machines, dish pits, beer lines, and the recycling bin, not just the fruit bowl. Summer highs near 84F speed things up, and Texas A&M AgriLife puts the fastest life cycle at as few as eight days. The second fly, Drosophila suzukii or spotted wing drosophila, attacks ripening fruit on the plant. University of Wyoming entomologists note it goes after healthy fruit as well as split or damaged fruit. It has only been confirmed in four Wyoming counties so far, but the state does not run a trapping survey, so reports from growers are how new areas get added.
- 1Red-eyed tan flies rising from a fruit bowl or a bag of potatoes when you disturb it.
- 2Flies circling the bar sink, beer taps, or the drip tray under a soda gun.
- 3A sour, vinegary smell from the garbage disposal or the bottom of the trash can.
- 4Flies inside a plastic cup taped over a drain overnight.
- 5Tiny brown pupal cases stuck to the underside of a counter lip or behind the coffee maker.
- 6Soft spots and small white larvae inside backyard cherries or raspberries.
Why it’s worth acting soon
- A single female can lay about 500 eggs, so a handful of flies becomes hundreds within two cycles.
- Flies moving between trash and prep counters can carry microbes onto food.
- In a licensed kitchen or bar, visible flies can become an inspection finding.
- A vacation rental left closed for a week can greet the next guests with a swarm.
- Backyard fruit with spotted wing drosophila larvae spoils on the plant and draws more flies indoors.
Treatment options and typical costs
Sanitation and moisture control
Quoted after inspection
Remove soft produce, rinse and dry recycling, empty the trash more often, and dry out mops, rags, and bar mats. In dry Cody air, flies hunt for the few damp, sweet spots left, so drying a surface can matter as much as cleaning it. This is the step that ends nearly every household case.
- Time
- A few hours, then two weeks of daily habits
- Best for
- Every home, rental, and business as the first move
Drain and disposal cleaning
Quoted after inspection
Brush out the inside of sink and floor drains, clean under the disposal splash guard, and use an enzyme cleaner over several nights to break down the film where larvae feed. Floor drains in commercial kitchens and lodges need the same treatment, plus a check that their traps hold water.
- Time
- Three to seven nights
- Best for
- Flies concentrated around sinks, ice machines, or dish areas
Bait traps for monitoring
Quoted after inspection
Jars of cider vinegar or red wine with a drop of soap, or a paper funnel over a scrap of ripe fruit, catch adults and point to the room with the source. Count the catch daily. A number that keeps falling means the cleanup is working, while a steady count means a source is still active.
- Time
- Ten days to two weeks
- Best for
- Measuring progress after sources are removed
Professional inspection and adult knockdown
Quoted after inspection
A provider traces hidden sources such as broken drain lines, debris under equipment, or a forgotten storage area, confirms whether you have fruit flies or drain or phorid flies, and may apply a pyrethrin aerosol to adults once sources are gone. Ask for the service plan in writing, including the number of visits.
- Time
- One to three visits
- Best for
- Restaurants, bars, lodges, and stubborn home cases
Prices are typical published ranges. Ask what’s included before you compare quotes.
Check under the sink for leaks and spills, and pull out the fridge drip pan.Where do fruit flies come from in a town that grows almost no fruit?
One real source usually explains nearly all the flies, and once it is gone the population collapses within one or two cycles. Slide the kitchen garbage can aside and check whatever has dripped onto the floor beneath it. Lift the potato and onion bags. Tape a clear cup over each drain overnight. Start with the room that has the most flies and work outward. In a dry, high-elevation town, the list of candidates is short: the fruit bowl, the disposal, the drain film in a seldom-used sink, cans waiting for recycling, a mop that never dries, and anything brewing or fermenting on purpose. Flies arrive on grocery produce or through screens, find something wet and fermenting, and stay. That makes the hunt simpler. Wyoming's 2025 agricultural overview from USDA shows no fruit or vegetable crops with reported production, so there are no orchards or packing sheds feeding a seasonal wave. Around Cody, fruit flies come from indoor sources: a kitchen, a bar, a storage room, or a drain.
Spotted wing drosophila and backyard fruit around Cody.
Spotted wing drosophila is a fruit fly that lays eggs in ripening fruit on the plant, and it is the one Wyoming growers watch for. University of Wyoming lists confirmed finds in Fremont, Goshen, Laramie, and Platte counties. No other county in the state has a confirmed record yet. That does not mean it is absent. The state does not include this fly in its CAPS survey, so detections happen when a grower notices damage and the University of Wyoming Extension entomologist confirms it. UW notes the female can lay several hundred eggs in her lifetime and attacks healthy ripening fruit, not only split or damaged pieces. If you grow cherries, plums, raspberries, or strawberries and find soft spots with tiny white larvae inside fruit that looked fine, save a sample and contact the extension office. In the meantime, pick ripe fruit often, refrigerate it right away, and clear fallen fruit. That also keeps ordinary vinegar flies from following the harvest into your kitchen.
Ripe fruit on the counter is the classic source. Refrigerate it once it's ripe.Restaurants, bars, and lodges on the Yellowstone route.
If you hire a provider, ask for a written report of sources found, products used, and recommended fixes, and keep it with your cleaning logs. In the busy summer stretch, when visitors pass through Cody on the way to Yellowstone, a missed drain cleaning shows up fastest. A practical routine: brush floor drains weekly, rinse and dry bar mats nightly, keep cut fruit covered and refrigerated, and rinse empties before they go out. Flies near food prep are the kind of thing an inspector notices. The Wyoming Department of Agriculture's Consumer Health Services Division inspects licensed food establishments statewide under the 2012 Wyoming Food Safety Rule, using a HACCP approach. Bar sinks, soda gun holsters, beer drip trays, floor drains under dish machines, and fruit garnish trays all hold the film a female is looking for. Food businesses in Cody carry most of the town's fruit fly pressure, because that is where fermenting sugar and constant moisture meet.
What dry air at 5,000 feet changes about the hunt.
If you find hump-backed flies that run on surfaces rather than fly, treat it as a plumbing question as much as a pest one. Run water in every drain once a week. A guest bathroom or basement floor drain that sits for weeks can lose that seal, letting small flies, including phorid flies from sewer lines, come up into the room. Dry air also evaporates the water seal in unused drain traps. Drains that see daily use, ice makers, pet water bowls near food scraps, and the base of the dish rack draw flies from the whole house. The flip side is that the few wet places left become magnets. That is good news: fewer surfaces stay wet enough for eggs. At 5,016 feet, with 53 percent average humidity and about 11 inches of rain a year, a wiped counter dries fast and a damp rag does not stay damp for long. Cody's climate cuts both ways.
How to compare two fruit fly quotes in Cody.
That document is what you show if an inspector from Consumer Health Services asks how you handled it. For businesses, also ask whether the provider leaves a written service report. A quote that names the drain, the storage room, or the bar area and explains the fix is worth more even if it costs more. A quote that leads with spraying and skips the source is a weak quote, because adults killed today are replaced by the eggs already laid. What do you need me to clean or change before the first treatment? How many visits are in the price, and what happens if flies are still around after two weeks? Is drain cleaning included, or is it extra? Did you confirm the species, and how? What source did you find, or what do you suspect? Ask each one the same questions. When two Cody providers quote very different prices, the difference is usually in what they plan to do, not in the product.
What affects the price
- Whether the job is a single kitchen or a restaurant, bar, or lodge with multiple drains and prep areas.
- Hidden sources that require moving equipment or opening access panels.
- Mechanical drain cleaning if the film is deep inside a line.
- How many follow-up visits the provider includes.
- Drive time to rural properties outside town.
- Misidentified flies, since drain and phorid flies take a different fix and longer to clear.
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Where do you see the most fruit flies?
When to call for help
Bring in a provider when you have removed every source you can find, traps are still filling after ten days to two weeks, and you cannot tell where the flies are coming from. That usually means a drain line, a gap under a cabinet, or debris beneath an appliance. Commercial kitchens and bars in Cody should call sooner, because the Wyoming Department of Agriculture's Consumer Health Services Division inspects licensed food establishments and a fly problem is easier to explain with a service record in hand. Call quickly too if the flies look hump-backed and run across surfaces, which can mean a phorid fly and a broken sewer pipe.
What you can do yourself
A home kitchen in Cody is a good place to try on your own first. The dry climate is on your side here: once you clear the fruit and dry the rags, mats, and drains, there are not many other damp, sweet places for a female to lay eggs. Set two or three traps, keep produce in the refrigerator, and rinse cans and bottles before they go in the bin. Most households see the catch drop within a week. It makes sense to hire a professional when the source is inside plumbing or walls, when you suspect a sewer leak, when a business needs documentation, or when a rental property sits empty between guests and nobody is there to keep up the daily routine. The provider's real contribution is the search and an accurate identification, since spraying adults without finding the source fails for everyone.
Fruit Flies in Cody
Homes carry a median value around $370,000, and in any house with a guest bath or a seasonal room, the drains that go unused for weeks deserve a monthly look. Instead, the flies in Cody concentrate in restaurant kitchens, bars, lodges, and homes where produce or drinks sit out. Statewide, USDA's 2025 overview lists no fruit or vegetable crops with reported acreage, so there is no harvest wave like the ones in fruit-growing states. Summer highs near 84F keep the life cycle short, while 15F winter lows end anything outside. Its fruit fly pattern follows two things: the kitchen and the visitor season. Cody is a rural town of about 10,000 people at 5,016 feet, founded in 1896 and known for the Buffalo Bill Center and as the eastern gateway to Yellowstone.
Local research
Fruit Flies in Cody, WY: what the public record shows
Before you compare quotes, it helps to know which fruit flies actually live in Wyoming, when they are busiest around Cody, and what the state figures look like. Everything below links to the agency or university page it came from.
Wyoming commercial kitchen oversight
Commercial kitchens, bars and drains are where Wyoming's fruit fly pressure actually concentrates, since the state grows almost no fruit.
Wyoming Department of AgricultureWhen fruit flies are busiest around Cody
Indoor driven and largely aseasonal: with no significant fruit crop and a short, dry outdoor season, Wyoming fruit fly problems track fermenting material inside rather than the harvest calendar.
The Wyoming Department of Agriculture's Consumer Health Services Division oversees the safety of the state's food supply and inspects licensed food establishments using a HACCP approach. University of Wyoming CAPS notes that spotted wing drosophila attacks healthy ripening fruit as well as damaged or split fruit, and that a female can lay several hundred eggs in her lifetime.
Rules that apply in Wyoming
Sources: Wyoming Cooperative Agricultural Pest Survey, University of Wyoming; Wyoming Department of Agriculture; University of Maryland Extension; Texas A&M AgriLife Extension. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep fruit flies away
- Keep bananas, tomatoes, and stone fruit in the refrigerator once they ripen.
- Run water through seldom-used drains in guest bathrooms and basements so their traps never sit dry.
- Rinse beer and soda cans before they go into the recycling bin, and wash the bin itself monthly.
- Dry bar mats, mop heads, and dish rags completely each night.
- Clean the splash guard and grinding chamber of the garbage disposal every week.
- Pick backyard cherries and raspberries promptly and clear fallen fruit from under the plant.
- Empty fruit, open drinks, and trash from short-term rentals at every turnover.
- Close blinds after dark in late summer, since the flies slip through window screens toward the light.
A good quote names the fly, the source, and whether follow-ups are included.Did you know?
Wyoming does not survey for spotted wing drosophila through CAPS; each confirmed county was added after a grower report checked by the University of Wyoming Extension entomologist.
Under favorable conditions a fruit fly can go from egg to adult in about a week, according to University of Kentucky entomologists.
Fruit flies are usually about 1/8 inch long with red eyes, a detail that separates them from fuzzy drain flies and hump-backed phorid flies.
Questions people ask
Why do I have fruit flies in Cody when the air is so dry?
Look at sink drains, the disposal, ice bins, dish racks, and the recycling first. Cody averages about 11 inches of rain and 53 percent humidity, so the wettest, sweetest spots in your house are often the only places a female can lay eggs. Dry air makes indoor moisture more attractive, not less.
Can fruit flies live through a Wyoming winter?
Remove that one source and the winter flies fade out. That narrows the search to a few places: a potato or onion bin, a drain, a home brewing setup, a compost bucket, or the trash. Cody's average winter low of 15F ends any outdoor population, so flies you see from November through March were born inside. Not outdoors.
Has spotted wing drosophila been found near Cody?
If your Cody cherries or raspberries have larvae in sound, ripe fruit, contact University of Wyoming Extension to have it checked. Because the state does not survey for it, new areas are found when growers report damage. University of Wyoming's confirmed list names only Fremont, Goshen, Laramie, and Platte counties. Not on the record so far.
How fast do fruit flies multiply?
In a warm Cody kitchen in August, with highs in the mid 80s, that turns three or four flies into a visible cloud in about two weeks. University of Missouri Extension puts it at about 500 eggs per female, with new adults ready to mate roughly two days after emerging. Faster than most people expect.
What should a Cody restaurant or bar do about fruit flies?
Start with floor drains, bar sinks, soda gun holsters, beer lines, and produce storage, since those are the usual sources. Wyoming Consumer Health Services inspects licensed food establishments under the state's 2012 Food Safety Rule using a HACCP approach, so keep a cleaning log and a written report from any pest control company you hire.
Why does my vacation rental have flies every time I check it?
In a Cody rental, empty the trash and refrigerator at checkout and run water in every drain. With an eight-day cycle, a week between turnovers is enough for a new generation. Guests often leave fruit, open drinks, and trash behind, and a closed unit warms up in the afternoon.
Will a pest control spray get rid of fruit flies for good?
Ask any Cody provider what source they found and what you need to clean, and treat the spray as a final step. A pyrethrin aerosol knocks down the adults in the air, but eggs and larvae in the source keep hatching. No spray works on its own.
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rewrite-v2 Published by Fruit Fly Exterminator · Updated October 11, 2026 · How we write these guides