- (301) 829-0060
- Mt. Airy, MD
- info@pestshieldinc.com
Pest Shield, Inc. removes bats from homes in Mt. Airy and across Carroll, Frederick, and Montgomery counties. We’ve been operating from Mt. Airy since 2011, hold Maryland Department of Agriculture business license #30263, and our team carries more than 60 years of combined pest management experience. Owner Troy Yowell is on-site for the majority of calls — including bat work, where identifying how the animal got inside matters as much as removing it. Free inspection on every new job.
How it works
Four steps. No surprises. Same answer whether it's your first call or your tenth.
You reach Troy or someone on his team directly. No call center, no dispatcher, no routing.
Same-day or next-day for most calls. Emergency stinging-insect situations and real-estate WDI deadlines get priority.
We identify the species, locate entry points, and find the source — not just the symptom.
Written recommendation, straightforward pricing, no obligation. If you don't need treatment, we'll tell you.
If a bat is loose in your house right now, the first thing is to slow down. Close interior doors to confine it to one room, open an exterior door or window in that room if you can do so without putting yourself between the bat and the exit, and don’t try to handle it with bare hands. Most homeowners in Mt. Airy who call us about bats are dealing with a single animal that found its way in through a gap — not a colony — but the response is the same: contain, don’t touch, and get it assessed.
Where there’s a complication, it’s usually around rabies exposure. The Maryland Department of Health recommends capturing the bat for testing rather than releasing it if there’s any possibility a person had unprotected contact with it — particularly if someone was asleep in the room, or if a child, pet, or person who couldn’t reliably report a bite was nearby. Bat bites can be small enough to go unnoticed. This isn’t a reason to panic; it’s a reason not to let the bat out the window before you’ve talked to a health professional.
How bats get into Mt. Airy homes in the first place is structural. The houses in this area — particularly older construction across Carroll County — tend to have the conditions bats look for:
The seasonal pattern matters too. Most bat-in-the-house calls we get come in late summer and early fall, when juvenile bats are dispersing from roost sites and inexperienced fliers end up in living spaces. A second wave shows up in spring when overwintering bats become active again. A single bat in the bedroom in August is a different situation than steady evening activity around the eaves in June — and the inspection is what tells you which one you’re dealing with.
60+ years of combined experience. Tell us what you’re seeing — we’ll come look, no obligation.
Troy gave me honest feedback and even suggested that I didn’t really need a treatment at this time, which saved me money. He inspected my basement and explained that there is old damage from beetles and also what the limitations of treatment were. Very helpful and informative and reasonably priced.
Anna West · August 2022 Read on Google →
Pest shield has done an incredible job. We had used other companies who were unsuccessful at getting rid of mice. Pest Shield doesn’t even come into the house! Since Pest Shield started working at our house, we have not had any problems at all! Robert is terrific.
Ira Polon · October 2021 Read on Google →
Troy is the best! As realtors, we work with Pest Inspectors a LOT and have had issues with multiple companies being wrong or missing some sort of infestation. Troy is the ONLY guy we can always trust will do an amazing job. He is quick to respond and usually can get the job done very quickly! We really appreciate you!
Camille Dixon · December 2025 Read on Google →
General pest & rodent control
Pest Shield handles single bat extraction from living spaces and small attic situations. That’s the scope we work within — and we want to be clear about it upfront, because bat work in Maryland has a specific regulatory boundary that customers deserve to understand before they hire anyone.
Here’s what’s included when you call us for bat removal:
What Pest Shield does not do is large colony exclusion. When an inspection reveals a maternity colony or a substantial roost in an attic, the proper response under Maryland law involves installing one-way exclusion devices, timing the work around the maternity season (typically May through August), and in many cases obtaining a Letter of Exemption from the Maryland Department of Natural Resources. That work is performed by wildlife control cooperators licensed for it, and if your situation calls for it, we’ll tell you and point you toward someone who can do it correctly. Recommending against work we’re not the right fit for is part of how we operate — it’s the same reason customers regularly call us for second opinions after being quoted unnecessary services elsewhere.
If your situation is a single bat extraction, that’s what we handle, and we’ll handle it the day you call when we can. The inspection is free, the assessment is honest, and you’ll know your options before any work begins. For broader pest pressures around your property, our pest control in Mt. Airy services cover the full range of what homeowners in this area encounter.
Owner
Founded Pest Shield in 2011 after years as a pest management contractor on U.S. military bases in Iraq and Afghanistan. Around 35 years in pest management. Personally handles or leads the majority of service calls.
Pest Management Specialist
Field technician handling residential and commercial service calls across Frederick, Carroll, and Montgomery counties.
Pest Management Specialist
Field technician handling residential and commercial service calls across the service area.
Our Entomologist
Consulting entomologist on species identification, conducive conditions, and treatment strategy for difficult cases.
Mt. Airy sits along the Frederick–Carroll County line, with the town’s older neighborhoods clustered around Route 27 and Main Street and newer development reaching east toward Ridgeville and west toward Twin Arch Road. The area’s mix of wooded residential lots, working farmland, and stream corridors leading toward the South Branch of the Patapsco creates strong foraging habitat for the insect-eating bats native to central Maryland.
Two species account for nearly all home-entry calls in this area: the little brown bat (Myotis lucifugus) and the big brown bat (Eptesicus fuscus), the latter more likely to overwinter inside attic spaces. Older Mt. Airy homes — particularly those with wood soffits, gable vents, and unsealed chimney flashing — offer the kind of small, warm cavities both species look for when they’re searching for a roost site.
Both, depending on the scale. A single bat that got into a living space or small attic area is handled by pest control — Pest Shield removes those, identifies the entry point, and provides a written assessment. A maternity colony or established roost requiring one-way exclusion devices and Maryland DNR coordination is wildlife control work, and we refer those situations to licensed wildlife control cooperators. The free inspection tells you which category you’re in before you commit to anything.
Don’t release it. The Maryland Department of Health recommends capturing the bat for rabies testing whenever there’s a possibility of unrecognized contact — and people sleeping in the same room qualifies. Confine the bat to that room with the door closed, contact your doctor or the local health department for guidance on the bat itself, and call us. Bat bites can be small enough to miss, which is why the protocol leans cautious. This is not a reason to panic; it’s a reason to handle the next step deliberately.
We handle single bat extraction from living spaces and small attic situations, with entry point identification included. We don’t perform large colony exclusion that requires one-way exclusion devices or a Maryland DNR Letter of Exemption — that’s specialized wildlife control work tied to the maternity season and licensed cooperator status. If our inspection finds a colony rather than a single animal, we’ll tell you straight and refer you to someone equipped for that work.
The signs are usually structural and acoustic. Guano accumulating under a gable vent or along a wall, brown staining around entry gaps, scratching or rustling sounds at dusk and dawn, and bats visibly leaving the structure in the early evening all point to more than one. The inspection covers the accessible attic and the full exterior of the home — soffits, fascia, ridge caps, vents, chimney flashing — to confirm whether what you encountered was a one-time entry or an established roost.
Yes — the inspection is free, with no obligation to schedule treatment afterward. For an active bat inside a home in Mt. Airy or the surrounding Carroll, Frederick, or Montgomery County area, we typically respond same-day or next-day. Call (301) 829-0060 and you’ll speak directly with Troy or our office — not a call center — and we’ll get you on the schedule based on what’s happening at the house.
