"Nuisance Wildlife Control Specialists" Since 1998
Wildlife Biologist on Staff

Big Brown Bat, Evening Bat, & Little Brown Bat

Removal & Control Services


Big Brown Bat, Evening Bat, & Little Brown Bat - (Eptesicus fuscus), (Nycticeius humeralis), & (Myotis lucifugus) - Family Vespertilionidae


Virginia is the home of 16 different species of bats. Three are federally endangered, three are species of federal concern, and ten non-game protected species. Three of these non-game protected species are of most concern to home owners; the Big Brown Bat, Evening Bat, and the Little Brown Bat. These three bats are the species that are more likely to inhibit people's homes in Virginia. Bats are closely related to primates and are all in the group Chiroptera, Latin for "hand wing", which means that their wings are essentially flaps of skin connecting their long fragile fingers together. Residential and commercial properties are equally desirable for bats to live in. A bat needs a space no more than an inch wide and a 1/3 of an inch tall to gain access in to a dwelling. Most bats will colonize in the gable vents, behind shutters, under siding, behind the trim boards, and sometimes in an old chimney. Bats are social creatures and live in colonies that can range from hundreds to thousands. Shortly before sunset most of the bats will emerge from the dwelling to seek out food and water throughout the night time hours. (Never assume that all the bats are out at once.) Even though they have poor eyesight, they navigate and find their food using echolocation. Their diet consists of insects, which plays an important role in the ecosystem keeping most insect pests to desirable levels for humans.

Identification Reproduction Guano Removal
Trapping Techniques Damage & Damage Areas Other Information
Health Concerns FAQ's  

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Bat Removal Techniques

Bat Removal Techniques

There are many different ways to get rid of bats, but if you are looking for a professional, permanent, non-chemical solution to your bat problem, with a written guarantee and warranted, you have found the only company in Southwest Virginia that can provide you with this and back it up. We follow the standards set by Bat Conservation International.

We will first cover every square foot of the structure looking for potential bat penetration points. When we find these potential penetration points we will seal them with 35 - 50 year caulk that is backed with a permanent rodent proof material, install rigid screens, and chimney caps and covers. Any gaps, holes, or vents that we find that show evidence of bats entering and exiting, we will install a one way venting device that allows the bats to leave unharmed but not re-enter.

If the structure is housing a maternity colony with baby bats, we will wait till the baby bats are able to fly before installing the venting devices. If you just vent the bats from their entry points without sealing the potential penetration points, the bats will just move to those other points. Waiting till after dark or when you think the bats have left for the evening to seal the entry point is not safe and will just move the bats to another point in the structure as well.

Biologically, the Evening Bat and Little Brown Bat should migrate to warmer climates for hibernation. Waiting till late fall to seal the structure when you think the bats have left to hibernate in warmer climates is not the solution either. The Big Brown Bat, biologically, will hibernate in man made structures. We have also found and believe that most of the Little Brown Bats in Southwest Virginia will hibernate in man made structures due to our moderate winters.

By waiting till fall, thinking the bats have left for the winter, and sealing the structure can risk the great potential of sealing bats in the structure and forcing them into the living part of your structure looking for a way out in the spring. Bats create offensive odors due to their droppings and feces, host bat bugs (Bat bugs are similar to bed bugs.), disrupt peoples sleep, and is one of Virginia's top rabies vectors.

Bat removal is our specialty.

We have helped restore peace of mind to hundreds of residential and commercial customers over the last 10 years. Bat removal is a technical process that requires professional experience. Do not risk other people's health or yours to anybody. You can trust our trained professional staff to solve any bat problem you may have, guaranteed and warranted!

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Damage and Damaged Areas

Bat Damage

Bats create more mental damage to people than physical damage to their property. There are alot of theories and misconceptions about bats that can really scare people. We stick to the facts and will educate you to the best of our knowledge to help with that fear of bats. Bats are very beneficial to the environment, but not beneficial to your home. Each bat that lives in your home will expel (Poop and Urinate) as much as its body weight per day. Over time the build up of guano (Bat Poop) and urine can create a lot of damage to your home or building. The combination of guano and urine can create a strong offensive odor and deteriorate just about any building material that comes into contact with it. The longer the bats are in the structure, the more damage their guano and urine can create. There are other issues associated with the build up of guano in a structure that will be discussed in the Health Concerns section.

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Health Concerns

There are two major health concerns associated with bats; rabies and histoplasmosis. Rabies is a virus that is fatal if untreated. This virus is found in the infected animals' saliva and is typically transmitted by a bite or through an open wound. Most bat bites are undetected. If you find a bat in a room that someone has slept in, you should have that bat tested for rabies through the Local Health Department. If the bat cannot be collected for testing, do not take a chance, you should have the rabies exposure shots administered by a doctor. For more information go to: http://www.cdc.gov/rabies/. Histoplasmosis is a fungus that grows on bird and bat droppings that can be fatal to humans. When the droppings are disturbed this fungus becomes air-borne and can be introduced into the body through your lungs and tear ducts. Droppings that are in dead spaces, like wall voids and soffits, typically will not cause any problems other than odor. Accumulations of droppings found in areas accessible to humans, like attics and crawl spaces, pose a threat to human health and should be removed. For more information go to: http://www.cdc.gov/niosh/hi97146.html. Do not attempt to remove bat droppings yourself. Without the proper masks with filters, suites, air scrubbers and vacuums you could infect yourself and others. See our Guano Removal section for more details.

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Guano Removal

Biohazard Cleanup Services

Once the target animal(s) have been removed and all the necessary repairs have been made to prevent their return, you should really consider our biohazard cleanup services. Urine, feces, hidden dead animals in the insulation and disease causing parasites will be left behind. Exposure to these biohazards can pose a serious health threat to you, your family, employees, citizens, customers, or your clients. We are trained and well equipped to effectively remove these biohazards and dispose of them properly according to OSHA and federal health regulations.

Air scrubbers with HEPA filters are used to prevent contamination of the living or work space of structures that have large accumulations of droppings   Without this air scrubber you will take a chance of contaminating the living or working space below the attic with the air-born fungus Histoplasmosis

Air scrubbers with HEPA filters are used to prevent contamination of the living or work space of structures that have large accumulations of droppings. When removing bat droppings we will disturb the droppings and create a lot of dust. The access hole has to be open to allow for the equipment to be in the attic. Without this air scrubber you will take a chance of contaminating the living or working space below the attic with the air-born fungus Histoplasmosis.

Commercial grade gas powered vacuum systems with HEPA bags attached

Commercial grade gas powered vacuum systems with HEPA bags attached are used to remove the contaminated insulation and droppings.

Commercial grade electric powered vacuum systems with HEPA filters

Commercial grade electric powered vacuum systems with HEPA filters are used for smaller dropping accumulations.

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Identification

Evening Bat
(Eptesicus fuscus), (Nycticeius humeralis), & (Myotis lucifugus) - Family Vespertilionidae

Body Size:

Females are larger than males.
  • Average Length (Adult): 3 5/8" - 3 3/4" tall.
  • Average Wingspread: 10 1/4" - 11" wide.
  • Ear Height: 1/2"
  • Average Adult Weight: 1/10 - 1/3 oz.
  • Young at Birth: 1/20 oz., pink with transparent wings and eyes closed.
  • 1 Day: Eyes open. (Very rapid growth.)
  • 5 Days: Hair present on back. Sooty black. Darker than adults.
  • 3 Weeks: Start to fly.
  • 6 - 9 Weeks: Weaned from mother.

Fur Color:

Short sparse dull brown fur.

Voice & Sounds:

Ultrasonic sounds or echolocation, that humans are unable to hear, are emitted to detect food and objects. The cries, which we can hear, are emitted 8 - 15 per second and sudden movements may increase the cries to 150 - 200 per second.

Little Brown Bat
(Myotis lucifugus)

Body Size:

Females are larger than males.
  • Average Length (Adult): 3 - 3 3/4" tall.
  • Average Wingspread: 8 3/4" - 10 1/2" wide.
  • Ear Height: 1/2 - 5/8"
  • Average Adult Weight: 1/4 - 1/3 oz.
  • Young at Birth: 1/20 oz., pink with transparent wings and eyes closed.
  • 1 Day: Eyes open. (Very rapid growth.)
  • 5 Days: Hair present on back. Sooty black. Darker than adults.
  • 3 Weeks: Start to fly.
  • 6 - 9 Weeks: Weaned from mother.

Fur Color:

Yellowish brown to olive brown.

Voice & Sounds:

Ultrasonic sounds or echolocation, that humans are unable to hear, are emitted to detect food and objects. The cries, which we can hear, are emitted 8 - 15 per second and sudden movements may increase the cries to 150 - 200 per second.

Big Brown Bat
(Eptesicus fuscus)

Body Size:

Females are larger than males.
  • Average Length (Adult): 3 3/4" - 5" tall.
  • Average Wingspread: 12 1/2 - 13 3/4" wide.
  • Ear Height: 5/8" - 3/4"
  • Average Adult Weight: 1/2 - 3/4 oz.
  • Young at Birth: 1/10 oz., pink with transparent wings and eyes closed.
  • 2 Day: Eyes open. (Very rapid growth.)
  • 5 Days: Hair present on back. Sooty black. Darker than adults.
  • 3 Weeks: Start to fly.
  • 4 - 5 Weeks: Weaned from mother.

Fur Color:

Long dark brown fur.

Voice & Sounds:

Long drawn out raspy squeaks, that humans are able to hear, are emitted to detect food, objects, and for communication. The cries or chattering, which we can hear, are emitted 8 - 15 per second and sudden movements may increase the cries to 150 - 200 per second.

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Reproduction

Male bats only produce sperm in the summer months and will retain this mature sperm for fall, winter, and spring breeding. Any sperm received by a female in the fall or winter will remain dormant in her while she is hibernating. While she is hibernating an egg will develop in one ovary. This egg will remain unfertilized until she comes out of hibernation in the spring. This is called "Delayed Fertilization". Once the egg is fertilized she will group with other females. This group is called a "Nursery Colony". This nursery colony consists of only females and new born bats. These bats will remain together in the same location or roost until late summer or fall. The males or "Bachelor Colony" will have several roosts that they will frequent regularly. Females will become sexually mature their first fall and males will start to produce sperm by their second summer. Statistically, most female bats will return to where they were born to raise their young.

Evening Bat
(Nycticeius humeralis)

Time of Year: Once a year in the fall before hibernation and again in the spring shortly after hibernation. September - October or March - April
Gestation: 50 - 60 days.
Young Born: May - mid June.
Average Reproductive Age: Females in their first year and males in their second year.
Number of Young: 1
Weaning: 6 - 9 Weeks

Little Brown Bat
(Myotis lucifugus)

Time of Year: Once a year in the fall before hibernation and again in the spring shortly after hibernation. September - October or March - April
Gestation: 50 - 60 days.
Young Born: May - July.
Average Reproductive Age: Females in their first year and males in their second year.
Number of Young: 1
Weaning: 6 - 9 Weeks

Big Brown Bat
(Eptesicus fuscus)

Time of Year: Once a year in the fall before hibernation, occasionally in winter, and again in the spring shortly after hibernation. September - October or March - April
Gestation: 50 - 60 days.
Young Born: May - mid June.
Average Reproductive Age: Females in their first year and males in their second year.
Number of Young: 1 - 2
Weaning: 4 - 5 Weeks

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Other Information

Evening Bat
(Nycticeius humeralis)

Home:

(Spring / Summer)
Biologically they are a true tree species and are found under the bark of dead trees. They will also frequent attics and other inaccessible places in buildings.

(Fall / Winter)
Unknown.

Habits:

Nocturnal. Start to leave roost ½ hour before dark and return ½ hour before daylight.

Food:

Very efficient insectivores. They will consume up to a half of their body weight in an hour. Mayflies are their favorite, but mosquitos are a majority before mayflies are present. Beetles, flies, caddis flies, and moths are also on the menu.

Flight Speed:

10 mph.

Average Life Span:

Males and females 2 years on average. 5 year life spans are common.

Predators:

Minks, raccoons, cats, hawks, owls, and snakes.

Little Brown Bat
(Myotis lucifugus)

Home:

(Spring / Summer)
Usually near a river or large body of water in rock crevices, hollow trees, the loose bark on trees, attics and other inaccessible parts of buildings, shutters, bell towers, and out buildings. Roosts are typically in areas less than 100 degrees F.

(Fall / Winter)
Biologically they are known to live or hibernate in caves during the late fall and winter. We have received calls in January and February for bats flying inside a house and identified the bats to be little brown bats.

Habits:

Nocturnal. Start to leave roost ½ hour before dark and return ½ hour before daylight.

Food:

Very efficient insectivores. They will consume up to a half of their body weight in an hour. Mayflies are their favorite, but mosquitos are a majority before mayflies are present. Beetles, flies, caddis flies, and moths are also on the menu.

Flight Speed:

10 mph.

Average Life Span:

Males 1 ½ years and females 1 - 2 years on average. 31 years is the record and 10 year life spans are common.

Predators:

Minks, raccoons, cats, mice, voles, leopard frogs, rats, hawks, owls, and snakes.

Big Brown Bat
(Eptesicus fuscus)

Home:

(Spring / Summer)
They will typically use the same home regardless of the season, but typically colonies will be found in hollow trees, attics, behind shutters, old chimneys or stacks, and caves. Big brown bats are not tolerable to high heat and will often move to a different location or further down in the structure closer to the basement or ground level.

(Fall / Winter)
Biologically they are known to live or hibernate in homes or buildings, caves, hollow trees, or in crevices in rocky cliffs during the late fall and winter.

Habits:

Nocturnal. Start to leave roost ½ hour before dark and return ½ hour before daylight.

Food:

Very efficient insectivores. They will consume up to a 1/3 of their body weight in an hour. Beetles are their favorite, but flies, moths, and flying ants are also on the menu.

Flight Speed:

21 mph.

Average Life Span:

Males and females 2 - 3 years on average. 19 years is the record life span.

Predators:

Weasels, bull frogs, cats, hawks, owls, and snakes.

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Frequently Asked Questions

Do you charge for bat services?
  • Yes. We are not funded by your local, state or federal government. We are a private business and must charge for our services.
  • See our Services page or Contact Us for pricing.
Do you guarantee your bat service?
  • We guarantee that you will receive the most courteous, honest, and professional wildlife management service in southwest Virginia or its FREE!
  • See Warranty page for more details.
What does the bat service fee cover?
  • The service fee covers us coming out, inspecting the structure, and a written bat service agreement with a warranty.
  • If you hire us to do the job, we will not charge you this service fee with a signed service agreement.
How much does it cost to get the bats out of my house?
  • Sealing up the structure can be expensive due to the necessity to seal up every potential entry point to prevent future problems.
  • Gable vents, soffits, ridge vents, and fascia areas are all potential entry points and must be sealed or screened.
  • Not all bat problems are difficult to solve, but can be very time consuming. The price to solve your bat problem is based on the size of the house, materials, and any rental equipment needed to reach hard to get to places that are not safe with a ladder.
How do I know if I have bats?
  • The easiest way to find out is to watch the exterior of your house just before dark to see bats exiting and entering.
  • Scratching and high pitched noises just before dark and daylight.
  • You are constantly finding bats in your house or business.
  • The high ammonia smell from their droppings.
Do I have to sign a contract agreement?
  • Yes. In order to protect you and our company a contract must be signed.
  • Our contracts spell out the services to be provided, as well as our guarantee and warranties.
  • You should not do work with a company that is not willing to back up their work in writing.
  • See our Contract page for more details.
Will you inspect my attic and crawl space?
  • Yes, we will need to inspect the attic or crawl space to check for any biohazards.
  • See our Guano Removal page for more details.
Will you repair the damaged areas to prevent future problems with bats?
  • Yes. We will inspect the entire structure to find the current problem area(s), as well as any potential problems areas that should be repaired. We will give you an itemized estimate of these repairs and prices in your contract. We will only recommend repairs that we feel are important to prevent future problems.
  • See our Repairs page for more details.
How can I be confident that the bats will stay out?
  • If the work is done properly, and it will be by our company, then you should have all the confidence in the world that they will stay out.
  • We offer a one-year minimum warranty on all of our bat work with the opportunity for the customer to extend this warranty indefinitely with yearly re-inspections and any upgrades to keep up with mother natures wear on your home or business.
  • Professionals always back up their work and will put it in writing.
  • Beware of great deals and big promises for a low price!
Do you warranty your bat repairs?
  • All of our warranties have a one-year minimum, with an option to renew that warranty at the end of that year.
  • This warranty does not cover "A Bat" from entering the building. It covers a colony of bats from entering the building. In the event that "A Bat" gets into the building an addition service fee may be required.
  • See our Warranty page for more details.
What do I get with the annual warranty renewal fee?
  • Once we receive your payment for the renewal we will return to your home and inspect the repaired areas for penetration from the bats.
  • If bats penetrate and colonize in the structure while it is under warranty, we will remove the bats and repair the original damaged area for free.
  • See our Warranty page for more details.
What happens if a bat penetrates an area that did not require repair in the initial service?
  • We will remove the bats for free as long as mother nature did not create the opening in the structure.
What if a different type of animal penetrates your repairs?
  • If this were to happen, we probably would treat it as if it were the same animal.
Does this annual service warranty renewal fee inflate as the house gets older? What does exclusion mean?
  • It is a technique where damaged areas or possible penetration points are made uninhabitable or penetrable to the bats and other wildlife.
  • See our Repairs page for more details.
Is it really necessary to seal up every hole even if a bat cannot fit through it?
  • It is important that your home looks as good or better after we are done with our job. Sealing unnecessary holes eliminates air drafts in your home and most importantly keeps everything looking uniform on your house.
How much are the repairs?
  • We will inspect the entire structure to find the current problem area(s), as well as any potential problems areas that should be repaired. We will give you an itemized estimate of these repairs and prices in your contract. You have the option to do what repairs you feel comfortable with. We will only recommend repairs that we feel are important to prevent future problems.
  • See our Repairs page for more details.
Why is it so expensive?
  • Our bat services are backed with 10 years of experience. By no means have we done it all and seen it all, but we have seen a lot and solved thousands of customer's problems. Your bat problem has some similarity to others and certainly can be solved by this company. We charge accordingly for our level of experience and professionalism. We guarantee and warranty that your home and health will be in a much better place than when we started.
We got a cheaper price from a company that has been in business longer than you!
  • We have been in the business of "wildlife removal" in Southwest Virginia for 10 years. We specialize in "Wildlife" and nothing else.
Does the other company have 10 years of full time wildlife removal experience?
  • Are you going to trust your customers, friends, or your family's health to someone that does not specialize in wildlife work?
  • Not all low priced companies are bad and looking to rip you off, they just lack in wildlife experience.
  • About 25% of our customers every year have tried the cheaper route and had to hire us the following year because the job was not complete or successful.
Your company said that they could seal up our house, but could not evict or vent the bats till a later time. Another
  • company never mentioned this problem, why?
  • This should tell you a lot about the other company. Bats have a baby season, like all animals. When bats have babies, the babies cannot fly for a period of time after being born. We cannot and will not vent bats during baby season.
When would be a good time for you to get in my attic to get the bats out?
  • We do not need to get in your attic in order to remove the bats. All the work that needs to be done in order to get rid of the bats is done from the outside, for the exception of the Guano Removal.
How do you all know when to seal up the final hole?
  • It usually takes 4 - 10 days for all the bats to leave the structure.
Where will the bats go once you evict them from my house?
  • Once the bats figure out that they cannot get back into your home or business, they will most likely follow another bat to the next suitable place that bats already live.
  • There is the possibility that if your neighbors have areas conducive to bat entry that they already have them or will be the next home for them.
  • The bats protective status prevents us from letting this happen.
There is a bat trapped in my wall, can you get it out?
  • There is a good chance that the bat is not trapped in the wall, it is most likely roosting in that location.
  • Once a bat gets in a house it can go anywhere.
  • If a bat is actually trapped in the wall void, then we can remove it by cutting a hole in the wall to remove it.
  • Please Contact Us so that we can set up an appointment.
I have a bat in my fireplace or chimney?
  • Not a problem, Contact Us to set up an appointment.
  • We will give you an estimate for a chimney cap(s) when we arrive.
  • See our Repairs page for more details.
I have a bat in my house or basement.
  • Not a problem, Contact Us to set up an appointment.
  • Usually we can remove the bat shortly after we arrive.
  • We will tell you how the bat got in and what we can do to prevent it from happening again.
How did the bat get in my room or basement?
  • The bat could have entered through the chimney or an open window or door.
  • There are several ways for a bat to enter a house from the outside. Once a bat enters a house or building they will typically move with the airflow patterns in the structure. The air flow patterns may lead them back out of the structure or into the living space.
Do bats have rabies?
  • Bats can carry the rabies virus and are one of Virginia's most reported species with rabies.
  • Please see our Health Concerns section for more details on rabies.
Can you remove the contaminated insulation from my attic?
  • Yes, we offer insulation cleanout and installation services.
  • See our Guano Removal page for more details.



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Cats (Feral) Chipmunks Coyotes Deer
Dogs Foxes Geese Groundhogs
Moles Muskrats Opossum Pigeons
Raccoons Rats River Otters Skunks
Snakes Flying Squirrels Gray Squirrels Voles
Woodchuck Woodpeckers