How to get rid of bats in Idaho
There is one humane, legal way to clear a bat colony in Idaho, and it is not a spray or a trap. Here is the actual process, step by step.
Step 1: Inspect and Find the Entry Points
Getting rid of bats starts with knowing exactly how they get in. A colony often uses gaps you would never notice from the ground: a lifted shingle, a soffit seam, a gable vent, a gap where two rooflines meet, or a quarter-inch crack along the fascia. A thorough exterior inspection maps every active opening. Miss one, and the exclusion fails. This is the single most important step, and it is the one DIY attempts most often get wrong.
Step 2: Time It for the Right Season
In Idaho, timing is not optional. From roughly June through mid-August, female bats raise flightless pups inside the roost. During this maternity season, exclusions must not happen, because sealing the exits traps the young inside. Legal, effective exclusions are scheduled for spring or for late summer through fall. Trying to rush a removal in mid-July does not get rid of bats faster. It traps pups and creates a far worse problem.
Step 3: Install One-Way Exclusion Devices
One-way devices are mounted over the active entry points. They work like a one-way door: bats can push out at dusk to feed but cannot get back in. The devices are sized and placed for the structure and the species, which in most Idaho buildings is the big brown bat or the little brown bat (little brown myotis). You can read about both on our Idaho bat species page.
Step 4: Let the Colony Exit
This is the patient part. Over roughly 5 to 10 days, the entire colony leaves through the one-way devices and cannot return. Rushing this window is how DIY jobs trap bats inside. The structure has to be confirmed empty before anything gets sealed.
Step 5: Seal Every Entry Point
Once the building is verified empty, every opening is sealed permanently with durable materials. This is what actually keeps bats from coming back. A removal without a full seal is just a temporary eviction. Our bat-proofing page covers how the structure is closed up for good.
Step 6: Clean Up the Guano
Bats leave behind guano, sometimes years of it, in attics and wall voids. Guano can harbor Histoplasma capsulatum, a fungus that causes histoplasmosis when disturbed spores are inhaled. Cleanup is not a shop-vac job. See our guano cleanup page for safe remediation.
Why DIY Commonly Fails
Most do-it-yourself bat removal goes wrong in a predictable way: a missed entry point lets bats keep coming back, a rushed seal traps bats inside where they die and create odor, or the work is done during maternity season, which is both inhumane and illegal. Add the histoplasmosis risk from disturbed guano, and the cheap DIY route often ends up more expensive than doing it right the first time. More common questions are answered on our FAQ.