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WHY PEOPLE THINK IT’S BATS
Click Here For Chimney Swift Sounds
Chimneys are one of the most misunderstood areas when it comes to wildlife problems.
Homeowners hear:
- fluttering or scratching sounds
- high-pitched chirping
- activity early in the morning or at dusk
…and naturally assume bats.
Bats do sometimes use chimneys, but it’s actually rare in Connecticut homes. Most bat colonies prefer:
- attics
- soffits
- ridge vents
- wall voids
These areas provide better shelter, temperature stability, and easier access points than a vertical chimney.
WHAT CHIMNEY SWIFTS ARE
Chimney swifts are small, dark-colored birds that migrate to Connecticut in the spring and summer. They are known for flying in tight circles and quickly diving into chimneys at dusk.
They build nests inside chimneys using:
- small twigs
- saliva to glue the nest to the flue
Once nesting begins, you’ll often hear constant chirping from the young during the day.
Unlike bats, chimney swifts are:
- active during daylight hours
- much noisier (especially during nesting)
- seasonal (they leave in the fall)
You can learn more here:
Signs of Bats in Your Attic
IMPORTANT: THEY ARE FEDERALLY PROTECTED
What You Can and Can’t Do About Chimney Swifts
Chimney swifts are protected under federal law.
This means:
- you cannot remove them during nesting season
- you cannot disturb or destroy an active nest
- you must wait until they migrate (late summer to early fall)
Trying to remove them early can:
- violate federal wildlife laws
- cause harm to the birds
- create bigger problems if babies are trapped inside
WHAT YOU SHOULD DO
If you suspect chimney swifts:
The best option is to wait until they leave on their own
Once they migrate:
- the nest can be removed
- the chimney can be cleaned
- a chimney cap can be installed
A proper chimney cap is the long-term solution — it prevents:
- birds
- bats
- squirrels
- raccoons
from entering in the future.
WHEN IT MIGHT ACTUALLY BE BATS
While rare, bats can occasionally use chimneys — especially if:
- the chimney is uncapped
- there are gaps in the structure
- the home has other bat entry points
Signs it might be bats instead of birds:
- activity mostly at night
- less chirping, more light scratching
- droppings (guano) near the fireplace or base
- bats seen exiting at dusk
If you’re unsure, a quick inspection can confirm exactly what you’re dealing with.
WHY THIS MATTERS
This is where a lot of homeowners get bad advice.
People are told:
- to “remove bats”
- to “seal the chimney” immediately
But if chimney swifts are present:
sealing too early traps them inside
removing them is illegal during nesting
Understanding the difference prevents:
- unnecessary work
- legal issues
- bigger problems later
When Bats Do Use Chimneys in Connecticut
While it’s uncommon, I have seen bats use chimneys in certain situations — usually when there are structural issues.
Most of the chimney bat jobs I’ve handled were in:
• Older stone fireplaces with gaps or shifting mortar
• Chimneys with damaged or missing flue tiles
• Cracked or deteriorated chimney crowns
• Homes with no chimney cap or a damaged cap
In these cases, the chimney acts more like an open void connected to the structure, giving bats a place to roost or move into attic spaces.
Unlike chimney swifts, bats are not building nests — they’re using the structure as a roost and may also be entering other parts of the home from there.
This is why it’s important not to assume — confirming what’s actually in the chimney changes the entire approach.
Related Bat Removal Services in Connecticut
If your chimney issue turns out to be bats — or you’re hearing noises elsewhere in your home — I provide full bat removal and exclusion across Connecticut.
Learn more about bat removal in your area:
If you’re unsure what you’re dealing with, I can take a quick look and point you in the right direction.
CONNECTING THIS TO REAL BAT PROBLEMS
If you’re hearing noises and it turns out not to be chimney swifts, there’s a good chance bats are entering your home somewhere else.
In Connecticut, most bat infestations happen in:
- attic spaces
- soffits and fascia gaps
- roofline intersections
- ridge vents
Not chimneys.
If bats are present, the solution is full exclusion and structural sealing — not quick fixes.
You can learn more here:
Bat Removal in Connecticut
Humane Bat Exclusion Process
Signs of Bats in Your Attic
Not sure what’s in your chimney?
I deal with these calls all the time across Connecticut — and most of the time it’s chimney swifts, not bats.
If you want to know for sure, I can take a look and point you in the right direction.
Call or text 203-680-0003
- honest answers
- no unnecessary work
- real solutions