The short version
Around Downers Grove, the most common animals are raccoons, squirrels and opossums. Identify yours first. Then get it out and seal the gap.
- Never handle a wild animal.
- Figure out which animal it is first.
- Check for babies before sealing.
- Use metal mesh, not foam.
- Secure trash and pet food.
Homeowners in Downers Grove with an animal in the attic, walls, chimney or yard.
What to look for
Around Downers Grove, the usual animals are raccoons, squirrels, opossums, skunks, groundhogs and bats. Each one gets in differently and needs a different fix. Babies are usually born from about April through June.
- 1Scratching or thumping in the attic.
- 2Torn vents, soffits or shingles.
- 3A musky or skunky smell.
- 4Dug holes under decks or sheds.
- 5Trash bins knocked over.
- 6Droppings on decks or in the attic.
Why it’s worth acting soon
- Chewed wires and damaged insulation.
- Droppings that can spread disease.
- Babies make removal harder.
- Rabies risk from bites.
Treatment options and typical costs
Inspection and Species Identification
$100–$300
Good inspections in Downers Grove also look for secondary damage: chewed wiring, torn ductwork, soaked insulation, and skunk or groundhog burrows undermining a slab or deck. That damage shapes both the plan and the price.
- Time
- 60–120 minutes
- Best for
- Every job; the species decides the method
One-Way Doors and Eviction
$200–$600
Eviction devices work best for squirrels and adult raccoons in Downers Grove when every other opening has already been sealed. Leave one gap unsealed and the animal simply moves to it.
- Time
- 3–7 days
- Best for
- Squirrels, raccoons, and birds using a single main entry
Attic Cleanup, Sanitation, and Follow-Up
$500–$3,000+ depending on insulation removed
Odor and scent trails are a real issue in Downers Grove: leftover raccoon or squirrel scent tells the next animal that this attic was a good den. Sanitizing removes the invitation along with the mess.
- Time
- 1–2 days
- Best for
- Soiled insulation, droppings, odors, and re-checks
Exclusion Repairs (Chimney Caps, Vent Screens, Foundation Mesh)
$300–$2,500+ depending on scope
Sealing work often comes with a warranty of a year or more; ask that it cover the roofline joints where Downers Grove squirrels push in during winter. Ask what it covers; the repair is the real value.
- Time
- Half a day to two days
- Best for
- Sealing the home after animals are out
Prices are typical published ranges. Ask what’s included before you compare quotes.
In the attic, look for flattened insulation, droppings and nests. Leave big cleanups to someone with the right gear.Animals around Downers Grove.
Homes from Downers Grove out to Bolingbrook and Naperville see much the same mix. Groundhogs are common here, and they're behind many holes under sheds in Downers Grove. Around Downers Grove, the most common animals are raccoons, squirrels, opossums, skunks, groundhogs and bats.
Local wildlife conditions in Downers Grove.
Across Downers Grove, the area is mostly suburban, so wildlife 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 Downers Grove usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing Downers Grove'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 Downers Grove and Illinois 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. Downers Grove sits in a humid continental climate, and that sets the pace for wildlife activity here: spring denning and fall (animals seek winter shelter).
Walk the foundation with a flashlight. Gaps at ground level let animals under the house.What’s that noise?
- A big burrow beside the shed: groundhogs. - Quick scurrying at dawn and dusk: squirrels. - Heavy thumps at night: raccoons. - Rustling at dusk at the roof edge: bats. - A strong smell under the deck: skunks.
Baby season.
Mothers look for warm, dry spots like attics and chimneys. Never seal a hole while babies are still inside. Bat exclusion waits until pups can fly, usually by mid-August. Around Downers Grove, most babies are born from about April through June.
A year of wildlife in Downers Grove.
- Winter: lows near 17°F in Downers Grove. Animals den up in attics. - Spring: babies are born from about April through June. Don't seal while young are inside. - Summer: highs near 84°F in Downers Grove. Animals roam at night. - Fall: animals hunt for winter dens. Seal gaps now.
Raccoons.
They tear open vents and roof edges. Never handle one. Heavy thumps at night usually mean a raccoon.
Tree squirrels.
Squirrels are busy at dawn and dusk. They chew small gaps into bigger holes, and wires too.
Opossums.
Opossums are quiet, slow and mostly harmless. They move into crawl spaces and under decks.
Skunks.
Skunks den under decks, sheds and porches. A strong smell after dark is the giveaway.
Groundhogs.
Groundhogs dig big burrows beside sheds, decks and foundations. Around Downers Grove, they sleep through winter and wake hungry in early spring.
Bats.
Bats slip through gaps as small as a thumb. Look for droppings under a gap at the roofline.
Getting them out the right way.
- Recheck: make sure nothing is trying to get back in. - Identify: figure out which animal it is. - Check: look for babies first. - Door: a one-way door lets the animal leave. - Seal: heavy metal mesh on every gap.
Where animals get in.
- Under decks, porches and sheds. - Roof vents and soffit corners. - Gaps where the roof meets the wall. - Uncapped chimneys. - Crawl-space doors and foundation vents.
If an animal gets inside the house.
Open an outside door or window in that room, then leave. Keep kids and pets away. Is it a bat, and was someone asleep there? Call your health department first. Close interior doors so it stays in one room.
Droppings and cleanup.
- Large attic messes are a job for pros. - Don’t sweep or vacuum droppings dry. - Wear gloves, a mask and old clothes. - Wet droppings down, then bag them.
Keeping your yard less inviting.
- Cover: clear brush and wood piles near the house. - Trash: locking lids, or keep bins in the garage. - Pets: feed them indoors. - Birds: use a seed tray, and sweep up spills. - Fruit: pick up what falls.
Wildlife myths.
- Lights and radios work: only briefly. - Out in daylight means rabid: not always; mothers forage by day. - Moving them is kind: often illegal, and babies get left. - Mothballs drive them out: they don’t, and they’re a health hazard.
Birds in vents and chimneys.
Most native birds are protected while nesting. Wait until the young have flown. Then fit a vent cover that still lets air out. Chimney swifts nest in chimneys in summer and leave in fall. Starlings and sparrows love dryer and bath vents.
If an animal seems sick.
Keep people and pets inside. animal control or your local health department. Don't try to trap or touch it. Staggering, circling or acting unafraid can mean illness.
Pets and wildlife.
Bring pets in at night. your vet if your pet tangles with a wild animal. Keep pets' rabies shots up to date.
What a wildlife visit looks like.
They look for tracks, droppings and torn vents. They set a one-way door or trap. Later, they come back and seal up. Cleanup comes last. The tech walks the roofline and the foundation.
If a skunk sprays.
- Under the house: air it out; the smell fades over days. - People and pets: wash with peroxide, baking soda and dish soap. - Tomato juice: it doesn’t really work. - Eyes: keep the mix out; rinse with cool water. - Clothes: wash with baking soda added to the load.
Babies found alone.
Leave them be and watch from a distance for a day. Hurt or clearly orphaned? Call a wildlife rehabilitator. Baby animals alone are often just waiting for a parent.
Fencing that works.
- Gates: keep gaps underneath to a couple of inches. - Diggers: bury wire mesh a foot down, bent outward. - Climbers: an electric wire near the top stops raccoons. - Gardens: hardware cloth beats chicken wire.
Questions to ask before you sign.
- Is cleanup included? - Which animal is it? - Where is it getting in? - How will you handle babies? - What happens to the animal? - What will you seal with?
What affects the price
- Length of deck or shed perimeter needing buried mesh.
- Presence of a raccoon latrine requiring special cleanup.
- Permit, relocation, or disposal rules in your state.
- Trip fees for daily trap checks over multiple days.
- Square feet of insulation removed and replaced.
- Protected bird species requiring seasonal timing.
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What worries you most about wildlife?
When to call for help
Call if an animal is in the attic, walls or chimney. right away if one acts sick or aggressive. Babies and droppings need careful handling.
What you can do yourself
Getting an animal out of the house is a pro's job. Never corner or handle one. Secure trash, bring in pet food and trim branches.
Wildlife in Downers Grove
Winter lows near 17°F in Downers Grove send animals into attics and crawl spaces in fall. In Illinois, bats are the animal most often found with rabies. In Downers Grove's neighborhoods, decks, sheds and trash bins draw animals in. Downers Grove has a humid continental climate, and wildlife activity here tends to follow spring denning and fall (animals seek winter shelter). An inspection in Downers Grove that starts outside and works inward usually finds the entry points, moisture, and shelter that matter most before anyone treats.
Local research
Wildlife in Downers Grove, IL: what the public record shows
Before you compare quotes, it helps to know which wildlife actually live in Illinois, when they are busiest around Downers Grove, and what the state figures look like. Everything below links to the agency or university page it came from.
Trapped striped skunks
Raccoons must be euthanized or released on the same property.
Illinois DNRCharging a fee for wildlife removal
Bats may not be shot, trapped, transported or held except in living-quarters situations.
Illinois DNRNuisance Wildlife species recorded in Illinois
- Raccoon (Procyon lotor) — Top terrestrial rabies vector in the East; relocation banned in most states.
- Striped skunk (Mephitis mephitis) — Primary rabies reservoir in Texas and the central U.S.; Illinois requires euthanasia of trapped striped skunks.
- Virginia opossum (Didelphis virginiana) — Furbearer in Illinois; rarely rabid; handled under general nuisance rules.
- Big brown bat (Eptesicus fuscus) — Most common building bat; protected with maternity-season exclusion limits.
When wildlife are busiest around Downers Grove
Fall/winter den-seeking; June-July bat blackout. Upper Midwest: bats and skunks are the reservoirs; raccoon rabies absent.
Based on Downers Grove’s humid continental climate profile.
Rules that apply in Illinois
For context, nationally
- Around 4,000; more than 90% in wildlife — Animal rabies cases reported per year. CDC
- More than 20% each — Skunks and foxes that expose people or pets and are rabid. CDC
Sources: Class A (commercial) Nuisance Wildlife Control Permit study packet (17 Ill. Adm. Code 525); Rabies in the United States: Protecting Public Health; Impacted Bats. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep wildlife away
- Use locking or strapped trash lids.
- Bring pet food in at night.
- Cap the chimney.
- Trim branches back from the roof.
- Bury wire mesh around decks and sheds.
- Pick up fallen fruit and spilled bird seed.
Metal mesh keeps animals out of vents for good. Foam and light screen won't hold.Did you know?
A raccoon's mask likely reduces glare and improves night vision
Starlings were introduced to North America in 1890 in Central Park
Questions people ask
How do I choose a wildlife company?
Look for someone licensed for wildlife work in Illinois. Ask how they handle babies and what they seal with.
How do I get rid of a skunk under my deck?
Wait until it leaves at night. Then close the gap with buried wire mesh.
Does homeowners insurance cover wildlife damage?
Sometimes, for sudden damage. Gradual chewing often isn't covered. Ask your insurer.
What season is worst for wildlife problems?
Spring babies and fall den-hunting are busiest around Downers Grove.
How do I get rid of a groundhog?
Fill in burrows after it leaves. Bury mesh around sheds and decks.
Can my neighbor feeding wildlife cause problems at my house?
Across Downers Grove, nuisance wildlife is usually removed by trapping, then the entry points are sealed so the next animal cannot move into the same spot. Across Downers Grove, because many animals are protected by state rules, removal has to be done legally, and a written plan should spell out removal, exclusion, and cleanup.
Which animals are most common around Downers Grove?
Mostly raccoons, squirrels, opossums, skunks, groundhogs and bats.
When are wild animal babies born in Downers Grove?
Usually from about April through June. Don't seal a hole while babies are inside.
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Sources (10)
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 Wildlife Exterminator · Updated September 11, 2026 · How we write these guides