How to evict a bat? - briefly
Identify the bat’s entry point, seal all openings except a one‑way exit, and use a humane trap or professional wildlife service to capture and release the animal. After removal, disinfect the area and install mesh or screens to prevent re‑entry.
How to evict a bat? - in detail
Bats enter structures seeking shelter, food sources, or roosting sites. Removing them safely requires knowledge of their habits, legal protections, and practical techniques.
First, confirm the species. Many regions list bats as protected wildlife; contacting local wildlife authorities ensures compliance with regulations and may provide assistance or permits.
Second, assess entry points. Inspect roofs, eaves, vents, gaps around windows, and chimney flues. Seal only after the bat has vacated, because closing openings prematurely can trap the animal inside, causing injury or death.
Third, create an exclusion schedule. Bats typically roost from late summer through early spring. The optimal time for removal is late summer (August‑September) when juveniles have left the maternity colony, reducing the risk of abandoning dependent young.
Fourth, implement exclusion devices:
- Install one‑way exit tubes or mesh flaps over each confirmed entry. The device allows bats to leave but prevents re‑entry.
- Ensure the opening is at least 2‑3 cm wide to accommodate the species’ wingspan.
- Position the device so that the exit faces away from the building to encourage outward flight.
Fifth, monitor for activity. Use a flashlight or infrared camera at night for several evenings. No sightings for 48 hours indicates successful departure.
Sixth, seal the openings permanently. Apply caulk, steel wool, or hardware cloth to gaps, then cover with roofing material or siding as appropriate.
Seventh, clean and disinfect the area. Bat droppings (guano) can harbor histoplasma fungi. Wear protective gloves, a N‑95 respirator, and goggles. Remove all waste, then treat surfaces with a diluted bleach solution (1 part bleach to 9 parts water) and allow to dry.
Eighth, prevent future colonization. Install chimney caps, maintain screen doors, trim tree branches that touch the roof, and keep lights off at night to reduce insect attraction.
If difficulties arise—persistent activity, large colonies, or uncertainty about species—engage a licensed wildlife rehabilitator or pest‑control professional experienced in humane bat exclusion. This approach safeguards human health, respects legal protections, and ensures the bat population is not harmed.