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What to do if…
you hear loud squeaking or fluttering from a chimney or vent and suspect trapped wildlife

Short answer

Stop using anything connected to that chimney/vent, keep the area contained, and contact animal control, your health department (for bats), a licensed wildlife control operator, or a chimney professional.

Do not do these things

  • Don’t light a fire or run an appliance that vents through that chimney/flue to “drive it out.”
  • Don’t block the outside opening of the chimney/vent (you can trap the animal and worsen distress or create ventilation problems).
  • Don’t try to grab it with bare hands or poke it with tools (injury risk; wildlife may bite/scratch).
  • Don’t use poisons, glue traps, flooding, or smoke tactics.
  • Don’t keep “checking closer” if bats might be involved — focus on containment and professional/public-health guidance.

What to do now

  1. Make the house systems safe first (and treat fume risk as urgent).
    • If it could be connected to a fireplace, furnace flue, water-heater vent, wood stove, or gas appliance, turn that appliance off and don’t use it until the vent path is confirmed clear.
    • If you suspect carbon monoxide (headache, dizziness, nausea, unusual fatigue): get fresh air immediately (open doors/windows if safe, turn off combustion appliances, and leave the home). If someone is not fully alert/unconscious, call 911.
  2. Contain the area and protect people/pets.
    • Keep kids and pets away from the fireplace opening or vent grille.
    • Close interior doors to limit where the animal could go if it enters the room.
  3. If a bat might be involved, treat it as a health-safety issue.
    • Don’t handle bats.
    • If a bat is in living space, confine it to one room by closing interior doors (only if you can do so safely).
    • Contact animal control or your health department for safe capture/testing guidance. Do not release the bat until you’ve talked with a public health expert.
  4. Call the right help (best available locally).
    • Animal control / local municipal services (often fastest for “animal in the house”).
    • A licensed nuisance wildlife control operator (many states regulate wildlife removal; a pro can remove and prevent re-entry legally).
    • A chimney professional if it’s clearly in the flue and inspection/access is needed.
  5. If it’s a bird that has dropped to the bottom of the chimney (fireplace below), set the room up so it can be handled safely.
    • Remove people/pets, close doors to other rooms, and close blinds/curtains to reduce frantic flying into glass.
    • Keep the room quiet while you wait for animal control/wildlife control/chimney help.
    • If you already know how your damper works and can open it without forcing anything, do so only in a controlled way; otherwise, don’t try to “figure it out” under stress — wait for a professional.
  6. Write down what matters for the responder.
    • Time started, sound type (fluttering vs scratching), exact location (fireplace opening, dryer vent, bathroom fan vent, soffit vent), and any signs of nesting material/debris.
    • If safe, take a short audio/video from a distance.

What can wait

  • You don’t need to identify the exact species before you call.
  • You don’t need to decide on permanent sealing, caps, screens, or repairs until after the animal is removed and you’re sure no young are present.
  • You don’t need to climb on the roof or dismantle ducting in a rush.

Important reassurance

Chimneys and vents can act like “hollow trees” for wildlife, and the noises can be startling. Most problems get worse when people use fire, seal openings, or try to handle wildlife — containment and the right help is the safest route.

Scope note

This is first-steps guidance to reduce harm and buy time. Specific removal methods depend on species, season (young may be present), and local/state rules about wildlife handling.

Important note

This is general information, not medical or legal advice. If bats are involved and there’s any chance of contact (especially if someone was asleep), follow public-health guidance promptly and avoid direct handling.

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