Salt Lake ValleyWasatch Front Edition · 2026

A Board Certified Entomologist’s Field Guide

The One-Hour
Entomology Degree

Twenty years in the field, a master’s, and a board certification — minus the twenty years.

A community manager’s field guide to what matters, what doesn’t, and what to actually do about it.

Your local entomologist

Trent Frazer, BCE

Board Certified Entomologist · M.S. Entomology · Falcon Pest Control

A Board Certified Entomologist with a master’s in the field and two decades building and running pest-control quality programs at scale. The credential is the highest in the field — and now it’s local. When a bug, a bird, or a burrow needs a real answer, Trent is the one to call.

How to use this guide

Flip to your problem. Get the answer.

This isn’t a textbook — it’s a desk reference for the Salt Lake Valley. Every pest gets the same six lines so you always know where to look: what it is, whether it matters, whether it’ll get worse, whether you can handle it yourself, whether it’s legally protected, and when it crosses the line into a real problem. Start with the Master Triage, then use the index to jump straight to whatever’s in front of you.

Leave it

A nuisance — ugly or annoying, but no real harm. Tolerate it or do the simple fix.

Watch it

Matters in the wrong spot or if it grows. Worth handling, not an emergency.

Act on it

A genuine hazard — sting risk, disease, or real damage. Handle promptly.

DIY

A manager or resident can legally handle this — usually mechanical, no license.

Licensed pro

Crosses into licensed-applicator or permitted-operator work. Make the call.

Protected

Illegal to kill under Utah law. Exclusion or DWR only — the costly mistake to avoid.

★ The Master Triage

Five questions for any pest call

Before you do anything — or promise a resident anything — run these five in order. Most calls answer themselves by question two.

Is anything actually at risk?A sting/venom threat, a disease, or real structural or landscape damage? If none of those — it’s a nuisance. Tolerate it or do the simple fix.

Common area, or private lot?The HOA owns the clubhouse, pool, playground, signage, ponds, and common landscaping — pests there are your job. Inside a resident’s own home or yard, it’s almost always theirs.

Will it resolve on its own, or get worse?Some things die off with the season. Others compound fast. Knowing which buys you the right amount of urgency.

Can you legally do it yourself?Mechanical work and habitat changes need no license. Chemical work on common property, anything restricted-use, and any protected species do. (See “The Licensing Line.”)

Has it crossed into a program?One mouse is a trap. Recurring evidence across a building is a managed program. (See “When It Becomes a Program.”)

? Before you answer the phone

Whose Bug Is It?

Who pays depends on the community type — and it’s usually not the association.

The first question a manager actually faces isn’t “what is it” — it’s “is this mine to deal with?” The answer turns on what the association owns and maintains versus what the individual owner controls, and that line moves with the community type. Your governing documents (CC&Rs and the maintenance matrix) are the final word; this is the general pattern.

Single-family neighborhoods: The home, its interior, and the private lot are the owner’s — so pest control there is almost always the resident’s responsibility. The association’s job is the common areas it owns and maintains: the clubhouse, pool, playground, common landscaping, signage, ponds, and shared structures. For most of these calls, the honest answer to a resident is “that one’s yours” — and your pest budget is really about the common areas.
Townhomes & condos within the community: The line shifts, because the association typically owns and maintains the building shells, roofs, attics, shared walls, and common structural elements. So pests that live in or travel through shared structure — roof rats in a shared attic, cockroaches or bed bugs moving unit-to-unit through shared walls, birds or bats in a shared roofline — become an association matter, even though the unit interior is still the owner’s. Here the manager owns more of the problem, because shared structure spreads pests.
The dividing question: Nearly every case comes down to one thing: is the pest in or on something the association owns and maintains, or in something the individual owner controls? Common element = association. Inside the unit or on the private lot = owner.
Where the real answer lives: When it’s genuinely unclear, the CC&Rs and the community’s maintenance-responsibility chart govern — not a rule of thumb. That’s the document to point to, and the reason “it depends on your community” is the correct first answer.

Quick-reference index

“I’ve got a…”

What you’re seeing	Go to
“Is this the resident’s problem, or the HOA’s?”	Whose Bug Is It?
Wasps at the pool, playground, or eaves	§1 Stinging & Flying
Swarms of bugs on a sunny wall (no biting)	§1 · Nuisance invaders
A hole or mound in the common-area lawn	§2 Burrows & Holes
Mouse or rat in the clubhouse / a unit	§3 Rodents
Roaches in a unit or trash room	§4 Indoor Invaders
A resident says “bed bugs” (townhome/condo)	§4 · Bed bugs
A scary spider	§5 Spiders
Damaged or hollow-sounding wood	§6 Wood-Destroying
Pigeons, starlings, or sparrows fouling a building	§7 Birds
“What actually gets rid of pigeons?” (and birth control)	§7 Bird Remediation
Bats in an attic, a snake, a raccoon, a skunk	§8 Bats & Wildlife
Mosquitoes around a pond or amenity	Mosquitoes & Standing Water
“Can I just handle this myself?”	The Licensing Line
“Is this thing protected?”	Protected Species
“What’s coming next month?”	The Wasatch Front Calendar

1 Bugs, Birds & Burrows

Stinging & Flying

What buzzes, what stings, and what to leave alone.

Open, single-layer umbrella paper-wasp comb with exposed cells — **Open comb is a paper wasp.** A closed ball or a ground hole is a yellowjacket; a gray football is a bald-faced hornet; hard mud tubes are a harmless mud dauber.Photos: paper wasp & yellowjacket, Falcon Pest Control. Others via iNaturalist / Wikimedia Commons: bald-faced hornet © Rev. Lee A. Payne Jr. (CC BY); mud dauber © Ryan Hodnett (CC BY-SA 4.0).

Yellowjacket ground-nest entrance hole — **Open comb is a paper wasp.** A closed ball or a ground hole is a yellowjacket; a gray football is a bald-faced hornet; hard mud tubes are a harmless mud dauber.Photos: paper wasp & yellowjacket, Falcon Pest Control. Others via iNaturalist / Wikimedia Commons: bald-faced hornet © Rev. Lee A. Payne Jr. (CC BY); mud dauber © Ryan Hodnett (CC BY-SA 4.0).

Paper WaspsPolistes — incl. the very common European paper wasp

Watch itDIY

What it is: Open, upside-down-umbrella nest — a single layer of cells you can see straight into. Under eaves, in playground equipment, grills, light fixtures, signage. Open comb = paper wasp.
Does it matter?: Low, unless it’s right at a pool, a playground, or a door residents use. They’ll sting if you disturb the nest, but they’re not out hunting people.
Resolve / escalate?: Grows through summer. Self-resolves at the first hard frost — the colony dies and only next year’s queens survive.
DIY or pro?: DIY. A ~$40 cobweb/pole sweeper knocks the nest down — that’s the whole method. Want a bigger kill first? Hit it at dawn or dusk with any wasp spray when they’re all home, then sweep the nest. No barrier spray needed.
Protected?: No — but confirm it’s a wasp, not a honeybee, before anything (see Honeybees).
Threshold: Only a real problem if it turns out to be a yellowjacket instead. See next.

YellowjacketsVespula — the exception to everything above

Act on itLicensed pro

What it is: Nest is a closed paper ball or underground — not open comb. Aggressive scavengers: they show up at the trash, the soda, the BBQ. A ground nest shows steady two-way traffic in and out of one hole.
Does it matter?: Yes. They sting readily and repeatedly and defend the nest in numbers. The one stinging insect that’s a genuine amenity hazard.
Resolve / escalate?: Escalates hard mid-to-late summer; colonies get large. Dies off in winter — but that’s too late to wait.
DIY or pro?: Pro. You can’t sweep a nest that’s underground or inside a wall void, and provoking one is how people get hurt. This is the rare case where treating the nest beats everything.
Protected?: No.
Threshold: Any active nest in a high-traffic common area = act now, professionally.

Bald-Faced HornetsDolichovespula maculata — a yellowjacket relative, not a true hornet

Act on itLicensed pro

What it is: The big gray “football” nest hanging in a tree, on a soffit, or under an overhang — a fully enclosed papery envelope. Black-and-white insect, larger than a yellowjacket.
Does it matter?: Yes, when it’s near people. They defend that enclosed nest aggressively.
Resolve / escalate?: Grows all summer; abandoned and dead by winter. Old nests are not reused.
DIY or pro?: Pro if it’s near a walkway, amenity, or entrance. A high, out-of-the-way nest can often just be left to die off in fall.
Protected?: No.
Threshold: Within reach of residents or a high-traffic path = handle it. Out of the way and high up = leave it.

Sand Wasps & Other Solitary DiggersBembix and kin — also listed in §2, Burrows & Holes

Leave itDIY

What it is: Solitary, ground-nesting wasps that dig in bare, dry, sandy soil. You’ll see individual wasps coming and going from small holes — sometimes several in a sandy patch — not the heavy single-nest traffic of a yellowjacket.
Does it matter?: Almost never. They’re solitary and not aggressive — they’re focused on digging and hunting, not defending a colony. Mostly a scare and a cosmetic turf issue. This is the one residents panic over that you can talk them down from.
Resolve / escalate?: Seasonal and self-limiting — solitary, not a growing colony. Gone by late summer.
DIY or pro?: Usually leave alone. If they’re colonizing a high-use sandy area, the fix is cultural, not chemical: they want bare, dry, thin soil, so thicker turf and better irrigation pushes them out.
Protected?: No.
Threshold: Rarely crosses one. Key confusion to resolve: a digger hole gets mistaken for a vole burrow — a soil mound with a single wasp working it is a wasp, not a rodent (full burrow ID in §2).

Sand wasp mound with the wasp at the hole entrance — **The tell is the wasp.** A small hole in bare, dry soil with a single wasp coming and going is a harmless sand wasp, not a rodent — the read that separates it from a vole.Photos: Falcon Pest Control.

Close view of a single sand wasp working its burrow — **The tell is the wasp.** A small hole in bare, dry soil with a single wasp coming and going is a harmless sand wasp, not a rodent — the read that separates it from a vole.Photos: Falcon Pest Control.

Mud DaubersSceliphron / organ-pipe daubers

Leave itDIY

What it is: Solitary wasps that build those hard mud tubes on walls, eaves, and under overhangs. Long, thin-waisted, often metallic.
Does it matter?: No. They almost never sting — they’re not defending a colony. They’re actually spider hunters. Pure cosmetic nuisance (the mud marks).
Resolve / escalate?: Each female works alone; numbers stay low. Not a building problem.
DIY or pro?: DIY. Scrape the dried tubes off and repaint if needed. No spray necessary.
Protected?: No.
Threshold: It’s an appearance complaint, never a safety one.

HoneybeesApis mellifera — the one stinging insect you don’t exterminate

Watch itRelocate, don’t kill

What it is: Fuzzy, amber-brown, not glossy. A spring/early-summer swarm is a temporary cluster (often on a branch) that usually moves on within a day or two. A colony established in a wall or soffit is a longer-term issue.
Does it matter?: Only if it’s in a high-traffic spot. Honeybees are valuable pollinators and shouldn’t be sprayed — the Utah norm is relocation by a beekeeper.
DIY or pro?: Call a local beekeeper or removal service for a swarm or an established colony — many collect swarms free. Don’t treat them as wasps.
Threshold: A passing swarm: wait a day. A colony living in a structure: get it removed before it establishes comb.

Boxelder Bugs & Elm Seed BugsBoisea trivittata · Arocatus melanocephalus — the Wasatch nuisance invaders

Leave itDIY

What it is: Boxelder bug: black with red-orange lines, swarms warm south/west walls in fall. Elm seed bug: smaller, brownish, peaks early-to-mid summer, gives off an odor when crushed. Both cluster on and around buildings in big numbers.
Does it matter?: No. They don’t bite, sting, damage anything, or breed indoors. Pure annoyance. The whole message: don’t panic, and don’t fog the building.
Resolve / escalate?: Seasonal pulses tied to host trees (elm, boxelder/maple) and the weather. Numbers drop on their own; they just look alarming while present.
DIY or pro?: DIY. Vacuum the ones inside; seal entry points (the real fix). The only place treatment earns its keep is an exterior perimeter band — never an interior or whole-tree spray.
Protected?: No.
Threshold: It’s a comfort/volume complaint, never a health or damage one.

Boxelder bug, black with red-orange lines — **Two harmless nuisance invaders.** Boxelder bugs are black with red-orange lines and swarm warm walls in fall; elm seed bugs are smaller and brownish and peak in early summer.Photos via iNaturalist: boxelder bug (CC0); elm seed bug © Toby / tobiashays (CC BY).

Elm seed bug, smaller with rusty-brown markings — **Two harmless nuisance invaders.** Boxelder bugs are black with red-orange lines and swarm warm walls in fall; elm seed bugs are smaller and brownish and peak in early summer.Photos via iNaturalist: boxelder bug (CC0); elm seed bug © Toby / tobiashays (CC BY).

Myth to kill on the spot“Murder hornets” are not here. The northern giant hornet was only ever found in the Pacific Northwest and was declared eradicated. There are no established giant hornets in Utah. The big intimidating ones residents photograph here are almost always bald-faced hornets or, occasionally, a sand wasp — alarming, not exotic.

2 Bugs, Birds & Burrows

Burrows & Holes

Read the hole — it tells you what’s living in your lawn.

Half the “what’s digging up the common area” calls are solved by looking at the opening: its size, whether there’s a soil mound, where the mound sits, and what kind of traffic it shows.

Pocket Gopherthe lawn-wrecker — also a rodent (§3)

Watch itLicensed pro

The hole: Fan- or horseshoe-shaped soil mounds with the hole plugged off to one side. No open hole most of the time — they backfill. Mounds appear in a line as the tunnel extends.
Does it matter?: Yes, for turf and roots. Gophers chew irrigation lines and plant roots and leave mounds that wreck mowing and aesthetics.
Resolve / escalate?: Escalates — one gopher tunnels continuously and more move in. Won’t self-resolve.
DIY or pro?: Trapping and baiting are the control methods; baiting is licensed/RUP territory on common property. This is core pest-control work, not a sweep-it DIY.
Protected?: No — legally controllable in Salt Lake County at any time. Utah Admin. Code R657-3b-9(7).
Threshold: Fresh mounds spreading across common turf = put it on a program before the tunnel network and the irrigation damage grow.

Two pocket gopher mounds, fresh soil pushed up across a common-area lawn — **Gopher mounds.** Fresh soil pushed up across the turf, the burrow plugged off to one side with no open hole and no surface runways. Fresh mounds spreading across common turf are the cue to put it on a program.Photo: Falcon Pest Control.

VoleMicrotus — “meadow mouse”; also a rodent (§3)

Watch itDIY-able

The hole: Small (~1½″) open holes with no soil mound, connected by surface runways — little worn paths in the grass, most obvious right after snowmelt. That snaking-trail-with-clean-holes look is the giveaway.
Does it matter?: Yes, for landscaping. Voles girdle and gnaw roots, bark, bulbs, and groundcover, and the runways scar lawns.
Resolve / escalate?: Populations boom fast — especially under snow cover and dense groundcover. Damage shows up all at once in spring.
DIY or pro?: A manager can legally trap. Your peanut-butter snap trap set right at a runway or hole works — voles will come out to it. Reducing dense mulch/groundcover near buildings removes the cover they need. A persistent or large infestation is a program.
Protected?: No — a nongame mammal, controllable in Salt Lake County. Utah Admin. Code R657-19; R657-3b-9.
Threshold: Runways spreading through common landscaping, or repeat plant damage, = move from spot-trapping to a managed program.

A maze of vole surface runways winding across a lawn, revealed as the snow melts — **Vole runways.** Small clean holes with no soil mound, joined by worn surface paths in the grass, clearest right after snowmelt.Photos: Falcon Pest Control, Wasatch Front.

Close view of vole runways and clean holes in the turf at the snow line — **Vole runways.** Small clean holes with no soil mound, joined by worn surface paths in the grass, clearest right after snowmelt.Photos: Falcon Pest Control, Wasatch Front.

Sand Wasp Burrowcross-reference — full entry in §1

Leave itDIY

The hole: Small holes in bare, dry, sandy soil with a flying insect coming and going — not a mammal. This is the one that gets misread as a vole burrow. If you see a wasp working the hole, it’s a sand wasp, and it’s harmless.
What to do: Leave it, or improve the turf so the soil isn’t bare and dry. Full details in §1, Stinging & Flying.

Yellow-Bellied MarmotMarmota flaviventris — mostly a bench/foothill issue

Watch itLicensed pro

The hole: Large burrows (much bigger than a ground squirrel’s) under rock piles, decks, sheds, retaining walls, and slopes. The animal is big — house-cat-sized. Mostly a concern for foothill / bench-adjacent communities, not the valley floor.
Does it matter?: Yes when burrows undermine structures, decks, or walls, or chew on landscaping and equipment.
DIY or pro?: Bigger than a DIY trap. This is a wildlife/pest-control job — exclusion (sealing under structures) plus professional removal.
Threshold: Active burrowing under any structure or retaining wall = handle it before the undermining gets expensive.

The 10-second burrow readMound + plugged hole = gopher. Clean hole + surface runways, no mound = vole. Hole with a wasp working it = sand wasp. Giant hole under a structure on the bench = marmot.

3 Rodents

Mice & Rats

There are only two control realities: trap it, or bait it.

Comparison of rat, mouse, and cockroach droppings on a white background, showing relative size and shape — **Size and shape name the maker.** Rat droppings are the largest, up to about three-quarters of an inch; house-mouse droppings are small and rice-grain sized, under a quarter inch; cockroach droppings are tiny, ridged, and blunt-ended. (Among rats, Norway droppings have blunt ends and roof-rat droppings are pointed — see the entries below.)Image provided by Falcon Pest Control.

House MouseMus musculus

Watch itDIY-able

What it is: Small, gray-brown, big ears, slender tail. Droppings are rice-grain sized (<¼″), scattered. The most common indoor rodent in valley buildings.
Does it matter?: Yes once inside — they contaminate food and surfaces, gnaw, and breed quickly. A health and damage issue, not just an ick factor.
Resolve / escalate?: Escalates — a few become many in weeks. One mouse means set traps now.
DIY or pro?: A manager can legally set snap traps and consumer bait stations. The lasting fix is exclusion: seal gaps down to ¼″ (a mouse fits through a hole the size of a dime). Recurring or building-wide = a program.
Protected?: No.
Threshold: Any evidence in a clubhouse, gym, or common kitchen = act immediately; those are the high-stakes spots.

Norway RatRattus norvegicus — the burrowing “sewer rat”

Act on itLicensed pro

What it is: Stocky, brown, blunt nose, tail shorter than the body. Burrows along foundations, under slabs, in woodpiles, near dumpsters and water. Droppings ~¾″ with blunt ends.
Does it matter?: Yes — serious. Gnaws wiring (fire risk), undermines structures, and carries disease. A confirmed rat is a bigger problem than a confirmed mouse.
Resolve / escalate?: Escalates and the colony hides — if you see one in daylight, the population is already high.
DIY or pro?: This is professional/program work in a community setting — coordinated baiting in tamper-resistant stations, trapping, exclusion, and sanitation/harborage cleanup together.
Protected?: No.
Threshold: Any confirmed rat in or around common buildings = act now, professionally; rats don’t stay a small problem.

Roof RatRattus rattus — the climber, increasing along the Wasatch Front

Act on itLicensed pro

What it is: Sleeker than a Norway rat, dark, tail longer than the body, an agile climber. Lives high — attics, soffits, trees, rooflines — and enters through vents, HVAC penetrations, and overhanging branches. Droppings ~½″ with pointed ends. Increasingly reported across Salt Lake County, especially in attached/condo communities and near water and fruit trees.
Does it matter?: Yes — same wiring, water-line, and contamination damage as Norway rats, just delivered from above. Attic and shared-wall communities are most exposed.
Resolve / escalate?: Escalates, and the rooftop entry points multiply the access.
DIY or pro?: Professional/program work — the win is sealing the elevated entry points (vents, gaps, branch bridges) plus trapping. Trim tree limbs back from rooflines as prevention.
Protected?: No.
Threshold: Noises overhead, gnaw damage at the roofline, or droppings in an attic = act; roof-rat problems compound fast in attached housing.

Deer MousePeromyscus — the hantavirus one; treat it differently

Act on itSpecial cleanup

What it is: Bicolored — brown on top, clean white belly and feet, larger eyes than a house mouse. Found in foothill/bench communities and in sheds, garages, storage, and outbuildings rather than deep inside occupied units.
Does it matter?: Yes — this is the one that can carry hantavirus, which is rare but serious. The risk is in disturbing droppings/nests in enclosed, unventilated spaces.
DIY or pro?: Control is the same trapping — but cleanup is the part to get right. Never sweep or vacuum droppings in an enclosed space. Air the space out, then wet it down with a 1:10 bleach solution before cleanup, and use proper respiratory protection for heavy contamination. See “When It Becomes a Program” for the cleanup distinction.
Protected?: No — but the cleanup precautions are non-negotiable.
Threshold: Droppings in a closed shed, storage room, or seasonal building = stop and use the wet-cleanup protocol, especially in foothill communities.

The only two control realities — and how to set them Trap it or bait it. That’s the whole menu. A snap trap goes perpendicular to the wall with the trigger end touching it (rodents run along walls), baited with a dab of peanut butter — not a pile. A bait/tamper-resistant station sits flush against a wall or foundation where you see activity. A manager’s legal, no-license trick for voles and mice: put a baited snap trap inside an anchored station — the station is just a tamper-resistant box (anyone can buy one), the snap trap does the work, and pets and kids can’t reach it.

4 Indoor Invaders

Cockroaches & Bed Bugs

The indoor pests where conditions — and shared walls — tell the story.

Utah has three cockroach species. Which one you have tells you why you have it, because each is driven by a different condition.

German CockroachBlattella germanica — the most common, and the real infestation risk

Act on itLicensed pro

What it is: Small (~½″), light brown, two dark stripes behind the head. Lives indoors, tight to kitchens and bathrooms — warmth, food, and moisture. The one that builds true infestations.
What’s driving it?: Hitchhikes in on boxes, groceries, used appliances, and between attached units, then thrives on available food, grease, clutter, and moisture. Its presence points to sanitation, harborage, and a moisture source — and to shared-wall spread in attached housing.
Does it matter?: Yes — reproduces explosively, contaminates food, and triggers allergies/asthma. The species that gets out of hand fastest indoors.
DIY or pro?: Professional. German roaches need a real gel-bait/IPM program plus sanitation; over-the-counter sprays scatter them and make it worse. In attached units, treat the cluster, not one unit.
Threshold: Any confirmed German roach in a unit warrants a professional response — waiting lets it spread through the wall.

Oriental CockroachBlatta orientalis — the “water bug”

Watch itLicensed pro

What it is: Larger (~1″), very dark, almost black, glossy, sluggish. The roach people call a “water bug.”
What’s driving it?: Moisture and cool, damp spaces — floor drains, sump areas, crawlspaces, basements, mulch and damp ground against the foundation. They come up from drains and damp exterior harborage.
Does it matter?: A sanitation/contamination concern, but they don’t explode indoors the way German roaches do. They signal a moisture problem worth fixing.
DIY or pro?: Fix the moisture and harborage first (the real lever); a pro handles the perimeter, drains, and damp entry points.
Threshold: Repeated appearances from drains or basements = address the moisture source, not just the roaches.

American CockroachPeriplaneta americana — the least common here

Watch itLicensed pro

What it is: The big one — reddish-brown, up to ~1½″, can fly short distances. Not very prevalent in Utah homes.
What’s driving it?: Associated with warm, humid, large-volume spaces — sewers, steam tunnels, boiler and mechanical rooms, large commercial kitchens. Usually an entry from drains, sewers, or below rather than a home-breeding problem.
Does it matter?: More of a commercial/mechanical-space and sanitation issue than a residential-unit one.
DIY or pro?: Professional — tie it to the entry route (drains, sewer lines, mechanical spaces) and seal/treat there.
Threshold: Several in a mechanical room or commercial kitchen = trace the entry point.

Bed BugsCimex lectularius — the shared-wall exception

Act on itLicensed pro

What it is: Flat, apple-seed-sized, reddish-brown; hides in mattress seams, headboards, and furniture. Signs: small blood spots and dark fecal specks on bedding, plus bites in lines or clusters.
Does it matter?: Yes in attached housing — this is the one indoor pest where the shared-wall and unit-to-unit question is real, because they travel along adjoining units and through furniture and belongings. (Most pest calls in single-family neighborhoods are the resident’s; bed bugs in townhomes/condos can become a building conversation.)
Resolve / escalate?: Does not resolve on its own and spreads if untreated. Treating only the complaining unit usually fails when adjoining units aren’t checked.
DIY or pro?: Professional. Retail sprays and “bug bombs” scatter them and entrench the problem. A BCE can determine whether it’s isolated or building-wide and which adjoining units actually need inspection.
Protected?: No.
Threshold: A confirmed report in an attached unit = inspect the neighbors (beside, above, below), not just the one unit.

5 Spiders

Which One Is Actually a Concern

In Utah, almost all of them are “just a spider.”

Kill this myth firstThere are no brown recluses in Utah. The brown recluse’s range doesn’t reach here, and decades of so-called sightings have not established a population. When a resident is sure they have one, they almost certainly don’t. This is the single most useful thing you can tell a worried community.

Western Black WidowLatrodectus hesperus — the one that warrants real respect

Act on itDIY-able

What it is: Glossy black, round abdomen, red hourglass underneath. Builds messy, strong, irregular webs in dark, undisturbed spots — under benches and railings, in meter boxes, window wells, woodpiles, playground undersides, and (notably) inside ground bait stations and utility boxes.
Does it matter?: Yes — the one Utah spider whose bite can be medically significant. They’re shy, not aggressive, but the risk is real where people reach into hidden spaces.
DIY or pro?: Knock down webs and egg sacs and reduce harborage and clutter in common areas; a manager can do that. In amenity areas where residents reach blindly (under bleachers, in boxes), a treatment program is worth it.
Protected?: No.
Threshold: Widows in spots people reach into — playground equipment, seating, electrical/irrigation boxes — = act.

Western black widow on its web, glossy black with the red hourglass on the underside of the abdomen — **The one that warrants respect.** Glossy black with a red hourglass on the underside of the abdomen, in its messy, irregular web. Everything else in Utah is, functionally, just a spider.Image provided by Falcon Pest Control.

Hobo Spider & Other “Scary” SpidersEratigena agrestis, wolf spiders, etc.

Leave itDIY

What it is: The hobo spider is a brown funnel-web builder common in window wells, basements, and ground level. Wolf spiders are large, fast, and hairy — the ones that make residents jump. Big and unsettling, but not the black widow.
Does it matter?: Low. A hobo bite is, at most, a painful local reaction — not the hospital-grade concern it was once rumored to be, and not a black widow. Wolf spiders are essentially harmless and are actually pest predators.
DIY or pro?: Knock down webs, reduce clutter and outdoor lighting that draws their insect prey, and seal entry points. Rarely needs treatment.
Protected?: No.
Threshold: Mostly a comfort issue. The job here is reassurance and a vacuum, not a spray.

The whole spider message in one lineIf it’s a glossy black spider with a red hourglass in a spot someone reaches into, respect it. Everything else in Utah is, functionally, just a spider.

6 Wood-Destroying Organisms

What Actually Eats the Building

Only one of these does real structural damage. Know which.

Subterranean TermitesReticulitermes — the real structural threat

Act on itLicensed pro

What it is: Pale, soft-bodied, live underground and come up through soil contact. Tell-tale signs: pencil-width mud tubes on foundations and crawlspace walls, and a spring swarm of dark winged termites (often mistaken for flying ants — termites have straight bodies, equal-length wings, and straight antennae). Salt Lake County is termite country — it is not in Utah’s termite-exception areas.
Does it matter?: Yes — this is the one that quietly destroys structural wood. The serious WDO call.
Resolve / escalate?: Escalates silently — damage accrues out of sight until it’s significant.
DIY or pro?: Professional, always — soil treatment and/or baiting by a licensed applicator, plus reducing wood-to-soil contact and moisture against the structure.
Threshold: Any mud tubes, a swarm, or hollow/damaged structural wood = professional inspection now.

Pencil-width subterranean termite mud tubes running up a concrete foundation wall — **The real structural threat.** Pencil-width mud tubes on foundations, and a spring swarm of dark winged termites, distinguished from flying ants by the straight body, equal-length wings, and straight antennae.Photos via iNaturalist: mud tubes © Michael K. Oliver (CC BY); termite & ant swarmers (CC0).

Winged termite: straight body, two pairs of equal-length wings, straight antennae — **The real structural threat.** Pencil-width mud tubes on foundations, and a spring swarm of dark winged termites, distinguished from flying ants by the straight body, equal-length wings, and straight antennae.Photos via iNaturalist: mud tubes © Michael K. Oliver (CC BY); termite & ant swarmers (CC0).

Carpenter AntsCamponotus — a moisture signal as much as a pest; also see ants below

Watch itLicensed pro

What it is: Large (often ½″) black or dark ants. They don’t eat wood — they excavate galleries in wood that’s already wet or rotting, leaving sawdust-like shavings (“frass”) below. Finding them usually means there’s a moisture problem.
Does it matter?: Moderate — they enlarge damage in compromised wood, but the underlying issue is the moisture. Far slower and less destructive than termites.
DIY or pro?: Fix the water source (the real fix — leak, gutter, grade) and have a pro locate and treat the nest. Surface spraying the trails alone won’t solve it.
Threshold: Big ants indoors plus frass or damp wood = find the moisture and the nest.

Nuisance Antsodorous house ants, pavement ants, etc. — no wood damage

Leave itDIY-able

What it is: The small ants trailing across counters, patios, and sidewalks. They do no structural damage. The most common is the odorous house ant (smells faintly of coconut/rot when crushed).
Does it matter?: No real harm — a contamination nuisance indoors and an appearance issue outdoors.
DIY or pro?: Wipe trails, remove food and moisture, and use consumer ant baits (let them carry it back — don’t spray the trail, which splinters the colony). Persistent indoor trails in common areas can go to a pro.
Protected?: No.
Threshold: It’s a sanitation/appearance call. The key is just knowing it’s not termites or carpenter ants.

The WDO bottom lineTermites destroy sound wood — serious. Carpenter ants exploit wet wood — fix the water. Regular ants damage nothing — just keep them out of the kitchen.

7 Birds

The Three You Can Act On — and Everything You Can’t

Get this one wrong and it’s a federal and a state problem.

Almost every bird in Utah is protected. Only three common pest birds are exempt — and even those come with rules. The safe instinct: assume a bird is protected until you’ve confirmed it’s one of the three.

Pigeon · European Starling · House Sparrowthe unprotected, non-native pest birds

Watch itLicensed pro

What they are: The three non-native birds that foul buildings, ledges, signage, and amenities with droppings and nesting. (Eurasian collared-dove is also treated as a nuisance, non-protected species in Utah.)
Does it matter?: Yes when droppings accumulate on walkways, equipment, or entrances — an appearance, slip, and sanitation issue, and a corrosion issue on metal and stone over time.
The legal reality: These three can be controlled in Utah without a state certificate or federal permit when they’re damaging property or creating a nuisance — but non-lethal methods must be tried first, all local/state/federal laws followed, and control done without poison, bait, or explosives. Utah Admin. Code R657-3b-9; R657-3-7.
DIY or pro?: The durable, lawful answer is exclusion and deterrence — netting, spikes, ledge modification, and reproductive baiting programs (e.g., OvoControl) — which is professional work. The legal “non-lethal first” requirement happens to point exactly where the real solution is anyway.
Threshold: Droppings fouling a walkway, entry, or amenity, or persistent roosting/nesting on a building = move to an exclusion program.

Rock pigeon — **The non-native three.** Pigeon, European starling, and house sparrow are the birds that can be controlled in Utah. Anything else, treat as protected until confirmed.Photos via iNaturalist: pigeon © daughterdad (CC BY); starling © egorbirder (CC BY); house sparrow © aparrot1 (CC0).

European starling in breeding plumage — **The non-native three.** Pigeon, European starling, and house sparrow are the birds that can be controlled in Utah. Anything else, treat as protected until confirmed.Photos via iNaturalist: pigeon © daughterdad (CC BY); starling © egorbirder (CC BY); house sparrow © aparrot1 (CC0).

Everything Else — Protectedswallows, robins, finches, native sparrows, raptors, geese, etc.

Protected — do not harm

What it is: Every native bird — and that’s nearly all of them. Swallows are the trap that catches managers: those mud nests under eaves and on commercial walls are protected, and once there are eggs or young in an active nest you cannot remove it.
The legal reality: Protected under the federal Migratory Bird Treaty Act and Utah law. Disturbing an active nest, eggs, or young can be a serious violation. 50 CFR; Utah Admin. Code R657-3.
What to do: Prevention is everything and timing is everything: exclude before nesting season so birds never build, by netting or blocking the eaves. Once a nest is active, leave it until the young have fledged, then remove and exclude. For raptors, geese, or any native species causing a real conflict, that’s a permitted/DWR matter — not a DIY removal.
Threshold: If it’s not a pigeon, starling, or house sparrow, treat it as protected and get guidance before touching a nest.

Bird Remediation — What Works, What’s a Waste

Exclusion (netting, spikes, wire, ledge angling): The durable fix. Physically denies birds the surface they want — quality netting can last on the order of ten years. The gold standard — but only if installed correctly. Tight, fully sealed edges are everything; loose or oversized edges let birds in behind the net where they get trapped, which is a worse problem than you started with and has to be torn out and redone. Needs occasional maintenance (clearing debris and old nests). Highest upfront cost, lowest cost over time.
Deterrents (fake owls, scare-eyes, reflective tape, noisemakers, gels): The category that disappoints. Birds habituate — they quickly learn the plastic owl and the noise are harmless and come right back. Effectiveness fades and varies by species. Fine as a short-term supplement; never a standalone solution. Deterrents move birds around — they don’t solve the problem.
Trapping: Right tool, wrong target — usually. Works for resident birds that stay year-round (some sparrows and starlings); useless against mobile pigeon flocks that simply reinvade. For a pigeon problem, trapping is the wrong tool.
Lethal / toxicants: Restricted, and rarely the answer. Restricted-use, licensed-and-permitted only, with real public-perception problems — and Utah law requires non-lethal methods first anyway. Not a manager’s path.
The takeaway: Exclude first and exclude right; use birth control where you can tolerate some birds in the meantime; treat deterrents as temporary; don’t bother trapping a flock.

Bird netting installed correctly: a taut, even grid with tightly sealed edges — **Exclusion only works if the edges are tight.** Installed right, netting is an even, taut grid with fully sealed edges. Loose or oversized edges let birds in behind the net where they get trapped — a worse problem than you started with.Photos: Falcon Pest Control.

Bird netting installed poorly: loose and sagging with gaps along the eave — **Exclusion only works if the edges are tight.** Installed right, netting is an even, taut grid with fully sealed edges. Loose or oversized edges let birds in behind the net where they get trapped — a worse problem than you started with.Photos: Falcon Pest Control.

Bird Birth ControlOvoControl — the source-level option

Managed program

What it is: An EPA-registered bird contraceptive (active ingredient nicarbazin), delivered as a bait the flock eats on a schedule. Not a poison — its acute toxicity is comparable to table sugar, and the effect reverses if baiting stops.
How it works: Treated birds lay eggs that don’t hatch, so the flock shrinks gradually through natural attrition instead of being killed.
Why it’s considered effective: It cuts a pigeon flock by roughly half over a year — a documented field trial in San Diego saw about a 53% decline over twelve months. Endorsed by humane and conservation groups (the Humane Society, ASPCA, Audubon, the Peregrine Fund) because it addresses the source — reproduction — rather than chasing symptoms.
The realities: It’s slow (you’re waiting on attrition, not an overnight drop), and it only works with sustained, consistent daily baiting through the breeding season — miss days and it underperforms. It fits only where some birds can be tolerated in the meantime, and it pairs best with exclusion: netting protects the priority surfaces while birth control brings the whole flock down.

The expensive bird mistakeKnocking down an active swallow or other native nest — or letting a landscaper do it — is a violation, not a cleanup. The entire game with protected birds is excluding them before they nest. Once eggs are present, your options narrow to waiting and then preventing next year.

8 Bats & Wildlife

When It’s Not a Pest — It’s Wildlife

Pest control, animal control, or DWR? Some of these you legally cannot kill.

Batsall 18 Utah species — protected, and timing-restricted

Protected — cannot killPermitted operator

What it is: A single bat that blunders into a living space, or a maternity colony roosting in an attic or soffit (most common in older and even newer construction through ridge vents, soffit gaps, and flashing). Little brown and big brown bats are the usual valley species.
The legal reality: Every Utah bat species is protected — it is illegal to kill them. A colony in a structure must be handled by exclusion (one-way devices that let bats out but not back in), then sealing — never poison. Utah DWR.
The timing trap: No exclusion during maternity season (roughly mid-May through mid-August). Sealing then traps flightless pups inside, which is both illegal and creates a far worse problem (dead bats in the wall, and adults pushing into living space to reach young). Exclusion happens before mid-May or after the pups can fly in late summer/fall.
DIY or pro?: A single bat in a room, a resident can release: open a window, kill the lights, leave it, and let it fly out — never handle a bat bare-handed (rabies risk). A colony requires a DWR-permitted wildlife-control operator, and DWR coordinates the timing.
Threshold: One bat indoors = release it. A colony, guano accumulation, or repeat entries = permitted operator, on DWR’s schedule.

Snakes (incl. Rattlesnakes)Great Basin rattlesnake vs. the harmless gophersnake

Protected — do not killDWR / relocator

What it is: Most snakes residents see are harmless. The gophersnake (the most common snake in Utah) mimics a rattler — it hisses and vibrates its tail — but has a slender pointed tail (no rattle), a round pupil, and a narrow head. The Great Basin rattlesnake (the only venomous snake on the Wasatch Front) has a broad triangular head, vertical pupils, and a blunt tail tipped with a rattle. Bench and foothill communities see them most.
The legal reality: Rattlesnakes — and native snakes generally — are protected under Utah law; it is illegal to harass or kill one, a class B misdemeanor, except in genuine defense of a person. Utah DWR; protected since 1989.
DIY or pro?: Don’t let residents grab a shovel. For a rattlesnake in a yard, common area, or play area, contact DWR or a licensed snake relocator — they move it to native habitat legally. A harmless gophersnake can simply be left alone or gently encouraged out; it actually keeps rodents down.
Threshold: A rattlesnake in a resident-use area = call a relocator/DWR, mark the spot, keep people and pets back. Don’t kill it — that’s when most bites happen, and it’s illegal.

Great Basin rattlesnake with a banded, blunt tail tipped by a rattle — **The look-alike that matters.** The harmless gophersnake mimics a rattler by hissing and vibrating its tail. Head shape, pupil, and tail tip tell them apart. Both are protected, neither is yours to kill.Photos via iNaturalist: Great Basin rattlesnake © Rolf Lawrenz (CC BY); gophersnake © Isaac Krone (CC BY).

Gophersnake with a narrow head, round pupil, and slender pointed tail — **The look-alike that matters.** The harmless gophersnake mimics a rattler by hissing and vibrating its tail. Head shape, pupil, and tail tip tell them apart. Both are protected, neither is yours to kill.Photos via iNaturalist: Great Basin rattlesnake © Rolf Lawrenz (CC BY); gophersnake © Isaac Krone (CC BY).

RaccoonsProcyon lotor — legal to control, illegal to relocate

Watch itWildlife control

What it is: Gets into dumpsters, crawlspaces, attics, and chimneys; tears insulation; raids trash. A wildlife-control problem more than a pest one.
The legal reality: Raccoons can legally be controlled in Utah at any time — but relocating or holding a live raccoon is prohibited (state veterinarian/UDAF jurisdiction). So “trap and release somewhere else” is not a legal option. Utah Admin. Code R657-3b-9(7); R58-14.
Health note: Rabies vector; also carries leptospirosis and the raccoon roundworm (Baylisascaris). Never let residents handle one, and treat droppings as a hazard.
DIY or pro?: Use a licensed wildlife-control operator. The lasting fix is exclusion — secure dumpsters and bins, cap chimneys, and seal crawlspace and attic access.
Threshold: Denning in a structure, or aggressive/daytime behavior (possible illness) = wildlife-control operator now.

Skunksthe rabies-vector digger

Watch itWildlife control

What it is: Dens under decks, sheds, and porches; digs cone-shaped holes in turf hunting grubs; the obvious odor. A nuisance and a health concern more than a structural one.
Health note: A primary rabies carrier in the region — the reason this is a hands-off, professional matter rather than a DIY trapping job.
DIY or pro?: Licensed wildlife-control operator. The durable fix is exclusion: screen and seal under decks/sheds, and address the grub problem that’s drawing them to the lawn.
Threshold: Denning under a structure, or any daytime/disoriented behavior, = professional removal and exclusion.

Pest control vs. animal control vs. DWRPest control handles insects and commensal rodents (mice, rats) and the controllable burrowers (gophers and voles). Wildlife/animal control handles raccoons, skunks, and the bigger mammals — often with legal limits on relocation. DWR governs protected wildlife — bats, native birds, and rattlesnakes — where the answer is exclusion, permits, or a licensed relocator, never a kill.

Cross-reference

The Licensing Line

What you can legally handle yourself — and where it becomes a licensed job.

This is the question behind half of these entries: “Can I just deal with it?” Here’s the honest, Utah-specific answer.

Always DIY-legal: Mechanical and habitat work needs no license at all, because it isn’t a pesticide application: sweeping down wasp nests, setting snap traps and tamper-resistant stations, sealing and excluding entry points, removing standing water, scraping off mud-dauber tubes, knocking down spider webs, and cutting back the clutter and moisture that pests need.
The consumer-product line: In Utah, only restricted-use pesticides legally require a license to use. General-use, off-the-shelf consumer products are not use-restricted. Utah Admin. Code R68-7-5(3). So a resident treating inside their own home with a store product is within bounds.
Where it becomes licensed: Applying any pesticide “for hire or compensation” makes you a commercial applicator under Utah law — which is exactly what a management company or vendor treating an association’s common property is doing. Utah Admin. Code R68-7-2(1). And any restricted-use product, anywhere, requires a licensed applicator. The practical rule: chemical treatment of common property — and anything restricted-use — is licensed-applicator work.
Why it matters to you: Liability follows whoever applies the product. Keeping the mechanical/habitat work in-house and routing chemical application on common property to a licensed applicator is both the legal line and the one that protects the association.

Cross-reference

Protected Species — Don’t Touch

The short list of things it is illegal to kill in Utah.

Bats

All 18 Utah species. Exclusion only, and not during maternity season (mid-May–mid-August). A colony needs a DWR-permitted operator.

Native birds

Nearly every bird except pigeon, starling, and house sparrow — including swallows, robins, finches, and native sparrows. Active nests with eggs/young are off-limits.

Raptors

Hawks, owls, eagles — strictly protected. Never a removal; a permitted/DWR matter. Also: rodenticide can poison the raptors that eat poisoned rodents.

Rattlesnakes

And native snakes generally. Illegal to harass or kill except in defense of a person. Use a relocator or DWR.

When in doubtIf you’re not certain something is one of the three unprotected pest birds or a controllable rodent/insect, treat it as protected and get guidance first. An exclusion plan is almost always legal; a kill often isn’t.

Cross-reference

Mosquitoes & Standing Water

For communities with ponds, water features, and amenity centers.

Why it matters: Mosquitoes are the one “summer nuisance” with a real health angle in Utah — they can carry West Nile virus. Communities with retention ponds, water features, irrigation catch-basins, and amenity landscaping are the exposure points.
The core fix (DIY-legal): Mosquitoes breed in standing water, so source reduction is the whole game and needs no license: empty or drain anything holding water for more than a few days, keep gutters and catch-basins flowing, refresh or aerate water features, and fix chronic low spots that pond after irrigation.
For water you can’t drain: Ponds and basins that must hold water can be treated with consumer Bti dunks/granules (a biological larvicide, sold over the counter, targets mosquito larvae, safe around people, pets, fish, and wildlife). A no-license, high-leverage tool for amenity water.
Free public resource: Salt Lake County is served by mosquito abatement districts — a public service the manager can call to assess and treat breeding sources in the community. Worth knowing before you spend a dollar.
Threshold: Standing water plus biting pressure around occupied amenities = source-reduce first, dunk what you can’t drain, and loop in abatement for persistent breeding.

Take-home

The DIY Toolkit

Everything in this guide a manager can legally do — and the cheap tool that does it.

Cobweb / pole sweeper

~$40 online. The entire method for paper-wasp and mud-dauber nests — sweep it down, no chemical needed.

Snap traps

The reliable rodent and vole tool. Perpendicular to the wall, trigger touching it, a dab of peanut butter.

Tamper-resistant stations

Anyone can buy them — they’re just a lockable box. Put a baited snap trap inside for a pet- and child-safe set near runways.

Bti dunks / granules

Over-the-counter biological larvicide for standing water you can’t drain. Safe around people, pets, fish, wildlife.

Exclusion materials

Steel wool/copper mesh, hardware cloth (¼″), caulk, door sweeps, vent screens. Sealing entry points is the only permanent rodent and bird fix.

Consumer ant bait

For nuisance ants — let them carry it home. Don’t spray the trail; that splinters the colony and makes it worse.

A shop vac

The right answer for boxelder bugs, elm seed bugs, cluster invaders, and harmless spiders. (For deer-mouse droppings, wet-clean instead — never vacuum.)

Pruners + a hose

Cut tree limbs back from rooflines (roof rats), and use water/aeration to keep amenity features from breeding mosquitoes.

Take-home

DIY That Backfires

Well-meant fixes that create a bigger, costlier problem.

Bait stations as rodent & widow housingAn empty or poorly maintained bait station becomes harborage. Left unserviced, the very boxes meant to control rodents end up sheltering them — and become a favorite hiding spot for black widows in exactly the dark, undisturbed cavity they like. A station is only an asset if it’s serviced; otherwise it’s a liability you installed yourself.

Bird netting with gaps too largeNetting installed with loose or oversized edges traps birds instead of excluding them. When the edges aren’t sealed tight, birds get behind the net, can’t get out, and you’ve turned an exclusion job into a worse problem that has to be torn out and redone correctly. Exclusion only works if the edges are tight — this is precisely where cut-rate installs fail.

Ill-timed bat exclusionSealing a bat colony out during maternity season (mid-May–mid-August) traps the flightless pups inside. It’s illegal, it kills the pups, it leaves you with dead animals in the wall, and it can drive the adults into living spaces trying to reach their young. Timing isn’t a detail here — it’s the whole job.

Spraying instead of identifyingOver-the-counter sprays make the two worst indoor pests worse. Spraying German cockroaches or bed bugs scatters them and entrenches the infestation; spraying ant trails splinters the colony into satellites. Identification first, then the right method — not a can of whatever’s under the sink.

Killing the protected thingThe single most expensive yard mistake is killing a protected species. A knocked-down active swallow nest, a shovel to a rattlesnake, a sealed-in bat colony — each can be a legal violation, not a cleanup. When it’s protected, the answer is exclusion and timing, never a kill.

Take-home

When It Becomes a Program

The honest answer on thresholds — and where the real lines are.

Managers always want a number: how many is too many? The honest, research-backed answer is that no health or housing agency sets a magic count for birds or rodents — the standards act on evidence, and the decision is professional judgment in your specific context. Here’s what actually drives it.

Rodents

The working rule: The widely used IPM standard is simple: one mouse or rat, or fresh evidence (droppings, gnaw marks, rub marks), justifies acting — trapping, sanitation, and exclusion. There is no “wait until you have X” threshold; control is easiest when numbers are still low.
The high-stakes settings: In a clubhouse kitchen, gym, or anywhere food is handled, the practical standard is effectively zero tolerance — a single sign is the trigger. Housing-quality standards likewise treat any evidence (sightings, droppings, gnaw marks, burrows) as actionable; a live rat indoors is treated as a serious infestation on its own.
The cleanup distinction: This is the line that does change behavior: in deer-mouse / hantavirus situations (sheds, storage, foothill outbuildings), don’t sweep or vacuum droppings. Air the space out, wet it with a 1:10 bleach solution, and use proper respiratory protection for heavy contamination. Commensal house mice and rats don’t carry hantavirus — but use good droppings precautions regardless.

Birds

The myth to drop: There is no “two inches of droppings” rule. That figure isn’t in any OSHA, CDC, or NIOSH standard — it’s pest-industry lore. The agencies use qualitative language (“large accumulations”), not a measured trigger.
What actually triggers action: Control is warranted when droppings, nesting, or flock activity reach a level that creates a health-code, slip/safety, structural, or nuisance impact in your context — a fouled entrance, an amenity people avoid, corrosion on metal or stone, blocked drains. It’s a judgment call, so document the reasoning.
The real cleanup hazard: The genuine health concern with bird (and bat) droppings is disturbing large, dried accumulations — that’s when histoplasmosis spores can become airborne. Heavy accumulations are a wet-method, respiratory-protection, professional cleanup — a separate decision from whether to start a bird program at all.

The threshold, in one lineFor rodents, the trigger is the first solid evidence. For birds, it’s the first real impact on health, safety, structure, or use. There is no number to wait for — and waiting only makes both harder.

Plan ahead

The Wasatch Front Pest Calendar

What’s coming, so you can get ahead of it.

Mar–Apr Wake-up

Voles revealed at snowmelt (runways and plant damage). Bird nesting starts — exclude before swallows build. Snakes emerge in foothill areas. Rodents that wintered inside are still active.

May–Jun Build-up

Wasp queens start nests — easiest to knock down now while small. Elm seed bugs begin. Bat maternity season begins (~mid-May): no exclusion until pups fly. Box elder activity. Termite swarms possible.

Jul–Aug Peak

Wasps, yellowjackets, and bald-faced hornets at full size — the busiest stinging-insect window. Sand wasps active in bare soil. Mosquito pressure highest around water. Spiders conspicuous. Bat exclusion still on hold until mid-August.

Sep–Oct Move-in

Box elder bugs swarm warm walls; rodents begin moving indoors for winter — seal entry points now. Bald-faced hornet nests die off. Best window to exclude bats once pups can fly. Yellowjackets aggressive at food before frost.

Nov–Feb Indoors

Stinging insects gone. Rodent pressure indoors peaks in the cold — the prime trapping/exclusion season. Overwintering invaders (box elder bugs) appear indoors on warm days. Quiet outside; busy in walls and attics.

That’s the hour — and the desk reference to keep.

Keep this packet at your desk. When a resident calls in a panic about a hole in the lawn, a wasp at the pool, a spider, or a bird on a ledge, you’ll know in ten seconds whether it matters, whether you can handle it, and whether it’s protected — and you’ll sound like you’ve done this for twenty years. Because now, in the ways that count for your job, you have.

When something crosses into licensed or protected territory — or you just want a second set of eyes from a Board Certified Entomologist — that’s what the practice is here for.

Trent Frazer, BCEBoard Certified Entomologist · M.S. Entomology · Falcon Pest Control

Questions from today’s session welcome.
Falcon Pest Control · Salt Lake Valley

Prepared for community-manager education in the Salt Lake Valley. Regulatory references are drawn from primary sources and are summarized for general guidance, not legal advice — verify current requirements with UDAF and the Utah Division of Wildlife Resources before acting. Key citations: Utah Admin. Code R68-7 (pesticide use and licensing); R657-3, R657-3b, R657-19 and R657-53 (protected and nuisance wildlife); federal Migratory Bird Treaty Act (50 CFR). Pesticide products must always be used according to their label.