Homeowner Guides
Birds Nesting in a Chimney: What Colorado Homeowners Should Do
Birds can turn an unused chimney into shelter, a nesting site or a temporary trap. For the homeowner, the challenge is balancing fireplace safety with wildlife protection.
First: stop using the fireplace
If you suspect birds or nesting material in the chimney, do not light a fire. A nest can obstruct the flue, and smoke or carbon monoxide may not vent correctly.
Determine whether the nest is active
The legal status of bird nests can be important. U.S. Fish & Wildlife Service guidance explains that most migratory bird nests are protected from actions that would unlawfully take birds, eggs or young, and active nests with eggs or chicks generally should not be destroyed without proper authorization.
Recent federal rules include certain authorizations for removal of migratory birds from the interior of buildings, but the exact facts matter. When in doubt, contact the appropriate wildlife authority or a qualified wildlife professional before disturbing an active nest.
Chimney swifts deserve special attention
Some birds, including chimney swifts, intentionally use chimneys for nesting or roosting. If you hear persistent chattering or know swifts are present, do not assume a standard nuisance-animal approach applies.
Once the nest is inactive
After lawful removal or natural departure, the chimney should be checked for:
- Remaining nesting material
- Feathers and debris
- Blocked flue area
- Damage at the top
- Missing or damaged cap
- Water entry
Only after the venting path is confirmed clear should the fireplace return to service.
Prevention is easier than repeat removal
A properly fitted chimney cap can help prevent many birds from entering while allowing the flue to vent as designed. Cap selection should match the chimney type and appliance.
Install prevention measures when the chimney is clear and when doing so will not trap wildlife inside.
Keaton Chimney Solutions provides chimney inspections and cap service throughout Denver, Colorado Springs, Fort Collins and surrounding Colorado communities. Call 720-734-5373.
Can I remove a bird nest from my chimney myself?
The answer depends on whether the nest is active, the species and applicable law. Do not disturb eggs or young without confirming what is permitted.
Can I use the fireplace while birds are in the chimney?
No. An animal or nest can obstruct venting and fire can injure wildlife.
Will a chimney cap stop birds?
A properly selected and installed cap can greatly reduce access, though it must match the chimney and venting system.
Need help with a chimney or fireplace in Colorado? Keaton Chimney Solutions serves Denver, Colorado Springs, Fort Collins, and surrounding communities. Call 720-734-5373.