Signs of a Bat Infestation and How to Handle It

Bats can be beneficial for controlling insect populations, but they don’t belong inside your home. If you’ve noticed unusual activity, it’s important to determine whether bats have found a way in and take appropriate action to remove them while preventing future entries.

Identifying a Bat Presence

Bats often enter homes through small gaps around rooflines, vents, and chimneys. Here are some indicators they may be inside:

• Nocturnal Noises – If you hear scratching or fluttering sounds at night, particularly in walls or ceilings, bats could be the source.
• Droppings (Guano) – Small, dark, and crumbly droppings found in attics, near entry points, or on window sills can indicate a colony.
• Greasy Stains – Bats leave dark, oily marks from their fur on frequently used entry points.
• Unpleasant Odors – A musty, ammonia-like smell from accumulated guano and urine is a telltale sign.
• Sightings – Seeing bats exit at dusk from the roofline or eaves suggests an infestation.

Safe Bat Removal

Once you confirm bats are inside, removing them properly is crucial. Since many bat species are protected, never attempt to capture or harm them. Instead, follow these steps:

1. Confirm Exit Points – Observe at dusk to see where bats are leaving. They often use the same openings repeatedly.
2. Install a One-Way Exit Device – These allow bats to leave but not return. Bat cones or netting are commonly used and should be in place for several nights to ensure all have exited.
3. Check for Remaining Bats – Before sealing openings, inspect attics and wall spaces to ensure none are trapped inside.
4. Seal Entry Points – Once bats have left, seal gaps larger than ¼ inch with caulk, metal flashing, or fine mesh.

Preventing Future Infestations

To keep bats from reentering, take preventative steps:

• Inspect Regularly – Check for new gaps or damage around the roof, soffits, and vents.
• Maintain Proper Vent Covers – Ensure attic and chimney vents are secured with fine mesh screening.
• Reduce Attractants – Outdoor lighting attracts insects, which in turn attract bats. Consider using motion-activated or low-intensity lighting.
• Trim Trees Near Rooflines – Overhanging branches provide easy access for bats to find entry points.

Addressing a bat issue promptly and using exclusion methods effectively will protect your home while ensuring these beneficial creatures remain where they belong—outside.