Bat Removal Laws in New Hampshire: Exclusion Season, Permits, and Penalties Explained
September 6, 2026
Before you call anyone about the scratching sounds in your attic, know this: bat removal laws in New Hampshire treat these animals far differently than raccoons or squirrels. Every bat species native to the state carries some form of legal protection, and getting the timing or method wrong can turn a simple pest problem into a wildlife violation.
New Hampshire’s rules exist because bat populations here have collapsed dramatically over the past two decades, driven largely by a fungal disease that wiped out entire colonies almost overnight. Whether you’re hearing scratching in the walls or you’ve already watched bats stream out of your eaves at dusk, understanding what the law allows, and when, matters just as much as finding the right contractor. This guide walks through protected status, legal removal windows, approved methods, permit requirements, what to do if a bat ends up inside your living space, and the penalties for getting it wrong.
Are Bats a Protected Species in New Hampshire
Yes. Bats are a protected species in the state of New Hampshire. That protection isn’t uniform across all eight species, though. Eight species of bats live in New Hampshire, and only two of these eight species commonly roost in buildings. There are four species that are state endangered and one species that is federally threatened, with little brown bats devastated by White-nose Syndrome.
The two building-dwelling species you’re most likely to encounter are the little brown bat (Myotis lucifugus) and the big brown bat (Eptesicus fuscus). The little brown bat’s population crash is the reason New Hampshire’s exclusion rules exist at all. In a 2012 statement, a New Hampshire Fish and Game biologist explained that populations of five of the state’s eight species of bats have plummeted, with hibernating numbers of the once-common little brown bat plunging over 99 percent, largely from white-nose syndrome.
The same regulatory framework that governs how you can interact with bats also shapes New Hampshire’s broader wildlife rules, including the hunting laws in New Hampshire that set seasons and licensing for other species, and the roadkill laws in New Hampshire that determine who may legally possess an animal carcass. Both fall under the same NH Fish and Game Department authority that oversees bat conservation.
Key Insight: Not every bat species carries identical legal weight. Three species are classified as species of special concern rather than formally endangered, though wildlife control operators are still restricted in how they handle any bat encountered on a job.
Is It Legal to Remove Bats From Your Home in New Hampshire
Removing bats is legal in New Hampshire, but only through approved, non-lethal methods and only within the state’s allowed timeframe. The United States has protected bats since 1970, and it is illegal to euthanize a bat colony through lethal strategies. The one exception for killing a bat is when it enters living quarters, potentially causing harm to people inside.
You have two practical options: handle the exclusion yourself outside the restricted season, or bring in professional help. You can either do this yourself or hire a licensed Wildlife Control Operator through New Hampshire Fish and Game’s referral resources. Either path requires following the same non-lethal exclusion standard.
Skipping the legal framework carries real consequences. Under the state’s Endangered Species Conservation Act, violation of the Act by taking a protected species incurs a misdemeanor penalty. That single fact should shape every decision you make about timing and method.
New Hampshire’s approach sits closer to the middle of the spectrum compared to other states. States like California’s wildlife removal laws impose even stricter species protections, while Virginia’s wildlife removal laws handle bat exclusion through a more permissive homeowner framework. Knowing where New Hampshire falls helps set realistic expectations before you start.
Bat Exclusion Season and Restricted Dates in New Hampshire
Timing is the single most important legal detail in New Hampshire bat removal. The exclusion of bats from an unoccupied structure by a licensed wildlife control operator is prohibited from May 15th through August 15th unless the NH Department of Health and Human Services, Bureau of Infectious Disease Control has otherwise given permission.
This window isn’t arbitrary. It lines up with the bat maternity cycle almost exactly. Birthing period runs late May through early July, with births typically staggered over a two to three week period, and maternity colonies begin to disband shortly after the young are capable of flying, typically in late July. Seal an entry point too early and you risk trapping flightless pups inside your walls.
Do not exclude bats from mid-May through mid-August when babies cannot fly and will get trapped in the space. The UNH Cooperative Extension reinforces this same guidance for homeowners handling exclusions on their own.
Once mid-August arrives, the door opens again. In August, when the bats are ready to leave, you may bat proof your structure through exclusion. It is a safe, effective, and humane way of evicting unwanted bats, using one-way doors to make sure the bats are out before you seal. That guidance comes directly from New Hampshire Fish and Game’s homeowner resource on bats.
| Period | Timing | What’s Allowed |
|---|---|---|
| Restricted exclusion window | May 15 – August 15 | No exclusion from unoccupied structures without health department permission |
| Maternity/birthing period | Late May – early July | Pups present; sealing entry points risks trapping young bats |
| Open exclusion season | Mid-August – mid-May | Standard exclusion permitted with one-way devices |
An important exception applies even during the restricted window. Whichever method you use for a colony, individual bats inside living spaces aren’t held to the same seasonal limits, a point covered further in the sections below.
Approved Bat Removal Methods in New Hampshire
New Hampshire allows exactly one category of removal method: live exclusion. The bats must be evicted from the home without using poison or other lethal means of removal, using a process known as live bat exclusion. No trapping, no fumigation, no chemical repellents recognized as legal solutions.
The mechanics are straightforward but require precision. The process consists of sealing the home with transparent caulking and installing one-way exclusion devices over the entry points, so the bats will fly out of the home and not be allowed to reenter the structure. For homeowners tackling this themselves, the state’s guidance is specific about the materials involved.
To create a one-way door, hang screening material over the remaining openings, tacked down at the top and sides but left open at the bottom to allow the bats to crawl down the wall to fly away. They will not be able to figure out how to crawl back up to re-enter.
- Inspect the structure for active entry points, focusing on rooflines, soffits, and gaps as small as 3/8 of an inch.
- Confirm the calendar date falls outside the May 15–August 15 restricted window.
- Install one-way exclusion devices over primary entry points, never sealing them completely at first.
- Wait several days to confirm all bats have left before permanently sealing the opening.
- Seal secondary entry points to prevent the colony from finding another way back in.
Trapping and poisoning are explicitly off the table nationwide, not just in New Hampshire. Bats cannot be trapped or poisoned. The only safe and humane method of removal is a bat exclusion. States as different in climate and bat population as Minnesota’s wildlife removal laws and Wisconsin’s wildlife removal laws land on the same live-exclusion standard, reflecting a regional consensus across the northern tier of the country.
Common Mistake: Sealing every visible gap at once, before confirming bats have actually left, often traps animals inside rather than excluding them. One-way devices need time to work before permanent sealing happens.
Do You Need a Permit to Remove Bats in New Hampshire
You don’t need a permit to exclude bats from your own home outside the restricted season, but commercial operators face licensing requirements. Anyone trapping wildlife outside of the regular season in New Hampshire must be licensed as a Wildlife Control Operator by the NH Fish and Game Department. That licensing structure is what separates a DIY homeowner from a paid professional.
| License Type | Who It’s For | Resident Fee |
|---|---|---|
| Wildlife Control Operator I | Furbearer, woodchuck, and porcupine trapping outside season | $15.00 |
| Wildlife Control Operator II | Commercial nuisance wildlife trapping practice | $135.00 (residents) / $400.00 (non-residents) |
Fees and scope come directly from state licensing forms. A Level II Wildlife Control Operator License is $135.00 for residents of New Hampshire and $400.00 for non-residents. Level II operators are engaged in the commercial practice of trapping nuisance animals and must meet additional training requirements before the state issues that license, according to New Hampshire Fish and Game’s operator page.
One notable carve-out applies to bats specifically, regardless of season. Under the state’s administrative rules, wildlife control operators may remove individual bats from portions of structures occupied by humans or livestock at any time of year. That provision, found in N.H. Admin. Code § Fis 308.02, exists precisely for the scenario covered in the next section: a bat that’s already inside your living space, not roosting quietly in the attic.
Permit and licensing structures vary widely by region. Compare New Hampshire’s approach against Arizona’s wildlife removal laws, North Carolina’s wildlife removal laws, or Illinois’s wildlife removal laws, and you’ll notice each state balances homeowner freedom against professional licensing differently.
What to Do If You Find a Bat Inside Your Home in New Hampshire
A single bat flying through your living room is a different legal and practical situation than a colony in your attic. The first question you need to answer is whether anyone had physical contact with the animal. If there’s a possibility that a person, pet, or livestock has been exposed to rabies, you are legally required to follow the directions of the county health department. Humanely capture any bat that had direct contact with a person, was in a room with a sleeping person, was around an unattended child, or was in a room with a mentally-disabled or impaired person.
That capture-and-test protocol exists because bats are a recognized rabies vector. If you’re unsure whether your pet’s vaccinations are current enough to protect against a potential bat exposure, it’s worth reviewing New Hampshire’s pet vaccination laws before an incident happens rather than after.
- Do not attempt to swat or throw objects at the bat.
- Close doors to isolate the bat in one room if possible.
- Open a window or exterior door to give it an exit route.
- If contact occurred, contain the bat without touching it directly and call your county health department.
- Avoid direct contact with guano, since droppings carry their own health risks.
Guano cleanup deserves its own caution. Bat droppings can accumulate quickly, leading to strong odors, contamination, and potential health risks. Diseases such as rabies and histoplasmosis are associated with bats and their droppings, making proper handling and cleanup essential.
Important Note: This article provides general legal and safety information, not medical guidance. If a bat has had contact with you, a family member, or a pet, contact your county health department or a physician promptly to assess rabies exposure risk.
Penalties for Illegal Bat Removal in New Hampshire
New Hampshire treats bat protection violations with a tiered penalty structure rather than a single flat fine. Any person who violates certain provisions of the Endangered Species Conservation Act, or any rule adopted under it, shall be guilty of a violation, while whoever fails to procure any permit required by the Act, or violates the terms of any such permit, shall be guilty of a misdemeanor.
The consequences go beyond fines. Equipment, merchandise, wildlife, or records seized in enforcement shall be held pending disposition of court proceedings, and if the defendant is found guilty, such material shall be forfeited to the state for destruction or disposition as the executive director deems appropriate. A wildlife control operator caught excluding bats during the restricted window, or a homeowner who poisons a colony, risks both criminal charges and confiscation of equipment used in the violation.
Licensing violations carry their own weight, separate from species-protection penalties. Operating as an unlicensed commercial trapper, or violating the terms tied to a Wildlife Control Operator license, exposes you to the same misdemeanor classification that applies to unpermitted takings of protected wildlife. It’s a strong argument for hiring a properly licensed operator whenever the removal falls outside the simple, unassisted homeowner scenario the state allows during open season.
Given how severely New Hampshire’s bat populations have already declined, enforcement isn’t purely theoretical. Fish and Game officers actively investigate reports of colonies being harmed outside the legal exclusion window, and the misdemeanor penalty structure gives them real teeth to act on those reports.