Wildlife in a chimney changes the order of work. Do not light a fire to drive an animal out. First identify what may be present, whether young or an active nest is involved, and whether anyone had direct contact. Removal, cleanup and exclusion should be planned as separate steps.
Colorado Parks and Wildlife recommends keeping fireplace dampers closed to reduce drop-in wildlife and screening chimney tops to prevent nesting. The agency also directs property owners to wildlife-removal providers for nuisance animals.[1] Federal protections can restrict disturbance of active migratory bird nests, and bat contact can require public-health advice.[2][3]
“Removal comes first, cleanup comes second and exclusion comes only after every animal can leave safely and lawfully.”
Species and season determine the safe response
Scratching at night, wing noise, chirping, odor and debris offer clues, but a camera or visual inspection may be needed. Raccoon mothers, nesting birds and bat colonies may involve dependent young. Immediate sealing can trap animals inside the structure.
Migratory bird law protects many native birds and active nests. The US Fish and Wildlife Service explains that nests with eggs or chicks generally cannot be destroyed without authorization. When birds are present, species identification and nest status should be resolved before removal or repair.[2]
Bats require special caution because bites and scratches may be small or unnoticed. CDC advises contacting animal control or the health department when a bat is found in a home so it can be safely captured for testing when appropriate.[3] Chimney service does not replace medical or public-health assessment.
How the service should proceed
- Stop fireplace or appliance use and keep people and pets away from the opening.
- Close the damper if it can be done without trapping an animal in the living space.
- Identify likely species, entry point, nest status and any direct human or pet contact.
- Use the lawful removal or exclusion method suited to the species and season.
- Remove nesting debris and contamination with appropriate protective measures.
- Inspect the flue and install a suitable cap or screen only after the chimney is clear.
Condition and decision guide
| Clue | Possible occupant | Immediate priority |
|---|---|---|
| Daytime chirping or repeated feeding trips | Nesting birds | Do not disturb until species and active-nest status are resolved |
| Night scratching and heavy movement | Raccoon or squirrel | Keep damper closed and contact a wildlife professional |
| Small fluttering at dusk | Bat | Avoid contact and follow public-health guidance if entry to living space occurred |
| Strong odor and no movement | Dead animal or old nest | Use protective cleanup and inspect for blockage or damage |
| Debris falling into firebox | Nest material or damaged cap | Stop use until the flue is confirmed clear |
Exclusion should prevent recurrence without creating a new hazard
After removal, the technician should inspect the cap, screen, flue tile, crown and chase cover. The entry point may be a missing cap, torn mesh, open chase corner or damaged termination. Repair should restore weather protection and preserve the vent opening needed by the appliance.
Cleanup scope depends on the amount and type of debris. Nesting material can obstruct the flue and hold moisture. Droppings and carcasses call for personal protection and controlled removal. Deodorizing without removing contaminated material only masks the source.
A post-removal chimney inspection confirms whether nesting or animal movement damaged the liner, damper or cap and whether the vent is clear. Sweeping may be needed, but it should happen after legal removal and before return to service.
Homeowner preparation and practical tips
- Do not use fire, smoke, poison or household chemicals to force wildlife out.
- Record the time of day, sounds and visible entry point from a safe location.
- Keep pets away from any animal that enters the room.
- Tell the provider about possible bites, scratches or contact before arrival.
- Ask how dependent young and active nests will be handled.
- Schedule cap or screen repair only after the chimney is confirmed empty.
Stop using the system and arrange prompt evaluation when
- Any animal, nest or debris may be inside the flue
- A bat entered occupied space or direct contact may have occurred
- An active bird nest may be protected by federal law
- The cap or masonry is damaged enough to fall or block exhaust
Questions homeowners ask
Can a fire be lit to make an animal leave?
No. Fire and smoke can injure wildlife, ignite nesting material and drive an animal into the home.
Can an active bird nest be removed?
Many native migratory birds and active nests are protected. Contact the appropriate wildlife authority or qualified professional before disturbing eggs or chicks.
What should happen after a bat is found indoors?
Avoid bare-hand contact. Contact animal control or the local health department for capture and exposure guidance, especially if a person or pet may have had contact.
Will a chimney cap prevent another entry?
A correctly fitted and maintained cap or screen greatly reduces access, but it must suit the vent and should be checked during routine service.
Request a visit
Tell Parker Homestead Chimney what you have noticed, how the system is used and whether the concern is urgent. Call or text (720) 222-4772, or use the contact page to request a written scope.
Request service from Parker Homestead Chimney
Sources
Technical and safety statements were cross-checked against the following sources, accessed October 15, 2026.
- Colorado Parks and Wildlife Protect Your Home From Wildlife
- US Fish and Wildlife Service Bird Nests
- US Centers for Disease Control and Prevention Preventing Rabies From Bats
- Colorado Parks and Wildlife Living With Bats
- Chimney Safety Institute of America Homeowners Guide to Chimneys Fireplaces and Woodstoves