Michigan Winter Bat Removal

Almost certainly no. Active bats are extremely rare outdoors during Michigan winters because there are no insects to eat. A bat in your living space during the winter nearly always means a colony is hibernating in your attic or walls. The bat didn’t get in because you left a garage door open; it likely found a small gap around an attic hatch, recessed lighting, or interior wall cavity while searching for water or a better temperature spot.

Hibernation isn’t a nonstop sleep. To survive 5 to 8 months on limited fat reserves, bats enter a deep state of low-metabolic activity. However, they must periodically wake up—roughly every two to three weeks—to drink water from condensation on your walls or to find a slightly warmer spot as your attic’s temperature fluctuates. This shifting often causes them to accidentally wander into the living areas of the house.

Yes, winter is actually an ideal time to start. If your roof is free of excessive snow and ice, we can safely access, identify, and perform all structural repairs to seal entry points. We install "one-way doors" (exclusion devices) on main entry points. These devices allow any awake bats to exit during warm winter spells or the spring thaw but prevent them from re-entering your home.

You must have patience; this is not an overnight process. While summer exclusions might only take three days, winter exclusions can take weeks or months. Because bats are localized, lethargic, and largely dormant, we cannot force them to move. They will only leave when the weather naturally permits flight. Your patience is necessary to ensure the entire colony exits safely on their own time.

Absolutely not. There are no approved poisons, pesticides, or fumigants for bats in Michigan. Using glue boards, chemicals, or noise emitters are ineffective gimmicks. Furthermore, bats are critically endangered due to White Nose Syndrome (WNS) and are state and federally protected. Killing bats in Michigan is illegal and can result in fines of up to $5,000 per violation. Professional, humane exclusion is the only legal way to solve a bat problem.

What is the legal 3-step winter bat removal process? We follow a strict, professional protocol:

1. Inspection: We locate all current and potential entry points.

2. Live Bat Exclusion: We seal the home and install one-way doors on primary entry points. (If possible, individual bats found in the attic may be safely removed and relocated by hand during this step.)

3. Return Visit: We re-inspect the property during the spring to ensure the colony has fully exited, remove the one-way devices, and complete final structural sealing.

We will assess this during your inspection, but generally, yes. Winter is a good time for attic sanitation. Often, we can safely remove the localized hibernating colony by hand while removing contaminated insulation. If the bat guano buildup is significant, we will recommend our attic restoration service to decontaminate and re-insulate your attic space.