Bat removal is a field of
expertise for our field technicians. The work is often complex.
Most bats in the US are protected by law. In addition, bats can
squeeze through very small holes and gaps, as small as 3/8 of an
inch, and bats usually enter via the most difficult to reach upper
peaks of your roof. Doing a bat job correctly and legally requires
a live exclusion of the bats. Every last entry gap and hole must
be found, and sealed, while leaving some primary exit points open
with the proper exclusion netting or devices appropriate to the
architecture. The bats exit the house at night, as usual, through
the one-way devices, and then cannot get back in. Attic cleaning
is often recommended in the case of bat infestation.
COMMON PROBLEMS: Bats are good animals. It's just
that, from time to time a colony (usually an all-female
maternity colony of Little Brown Myotos, Big Brown Myotis, or
Mexican Free-Tail Bats) will choose your house or building as
a roosting site. Bats require specific conditions. They want
to live in a hot, dry, place which is high enough off the
ground to allow for flight clearance, and be safe from
predators. Your attic is perfect! This would be okay, except
that bats leave their droppings (guano) behind, and they live
a long time, and stay in the same roost for decades, if
possible. Thus, untreated, a colony of bats can grow to huge
numbers. We have seen many cases of thousands of bats in a
single colony. They most commonly cause these problems:
- Buildup of guano (bat poop) inside the attic or walls or
- Odor from the large colony of bats and their waste.
- If the colony is large enough, noise is an issue.
- Health concerns, such as rabies or histoplasmosis.
OUR BAT REMOVAL PROCESS: Luckily, the most
effective means of removing bats from a building is also legal
and safe for the bats - none are killed in the process. We
perform a live exclusion. The bats fly out of your house every
night for water and food, and thus we are able to install
one-way exclusion devices that allow them to get out safely,
but not fly back inside. This may sound simple, but there are
many important considerations, such as:
- The species of bat - different bats behave differently,
fly differently, and relate to exclusion devices and
techniques in different ways.
- The architecture around the entry/exit holes - this will
determine the devices used.
- Size of the colony - this actually matters a great deal.
Larger colonies are considerably more complex to deal with.
- Number of entry points - some buildings are simple. Some
are incredibly complex, with hundreds of entry areas.
- The weather - this affects bat behavior, and whether or
not an or all bats exit.
- Not all bats leave each night, or at the same time. This
affects the exclusion process.
And very importantly, take not of the time of year - no exclusions
may be done during the maternity season, when the attic is full of
flightless baby bats. Any exclusion attempts during this time
result in disaster. This period varies by species, but for most
north american bats, it is during the summer months, most
typically late May through mid August.
OTHER BAT ISSUES: From time to time, we encounter
problems with bats other than a maternity colony roosting in
an attic of a building. Possibilities include:
- A bat (or several) flying around inside the living space.
Beware, this is almost ALWAYS a result of bats living in the
attic or walls, which have crawled down into the living
area. We can safely remove a bat in this scenario.
- A bat has been found inside the house, and you fear rabies
- A colony of bats living inside the chimney.
- A colony of bats living somewhere in your external
building architecture, such as tile roof, behind window
- Bat droppings scattered outside in an undesirable
ATTIC DECONTAMINATION & OTHER SERVICES: In most
situations, it may be desirable to clean your attic after
you've removed bats from the space. They can leave behind
large amounts of droppings (guano), sometimes a foot or more
deep. These remnants attract insects like cockroaches. The
scent left behind is very strong, is unpleasant to you, and
can encourage new bats to attempt to enter your house. It's
possible or likely that mold will grow on the areas of feces
and urine, and urine can damage wood or sheetrock. Some of the
mold can potentially cause diseases that people can catch,
such as histoplasmosis.
- We remove or vacuum all droppings, or remove all the
- We fog the attic with a special enzyme-based cleaner that
destroys any organic matter and deodorizes the space.
- In severe cases, complete attic restoration is necessary,
with complete insulation removal, wood repair,
decontamination, and new insulation replacement.
There is no such thing as an effective bat repellent. Many companies
sell the same product over and over (usually moth balls, sometimes
mixed with coyote urine or sulphur), but marketed toward each
possible nuisance animal, sold in containers labeled "Critter Out"
or "Bat-A-Way" or "Squirrel Stopper", etc. Still others sell devices
that emit high-pitch sounds, again marketed for all wildlife
species. These products absolutely will not affect bat behavior.
It is both illegal and incredibly messy, dangerous, and unethical to
attempt to kill bats. I have seen some pest control companies treat
a colony of bats like a colony of insects, and spray poison, or tent
the building to kill them. This is horrible on many levels. First of
all, the bats, once exposed to poison, will immediately crawl down
the walls in an attempt to escape. If there are any openings into
the living space, even 3/8", bats flood into the house. If they are
killed, they rot in the walls, and create a terrible odor. Usually,
not all of them will be killed. You will have sick, and/or
aggressive bats in the area. Please do not attempt to kill bats. It
is so much easier, and so much more effective to do a live
exclusion. Not to mentionl legal, and ethical. Bats are good animals
- there's a reason they are protected.
Here are specific step-by-step instructions for how to remove Bats
in the Attic
which is not an easy task.
Are bats dangerous to people or pets? Read my Are
How To Get Rid of Bats
- Tips and
steps for getting rid of bats.
Bat in Your House
- Tips on how to get
a bat out of hour house.
Bat in the Chimney
about removing bats in a chimney.
- should you build or install a
place for bats to live?
Bat Maternity Season
- the time of
the year during which no bat exclusions should be performed.
methods for how to keep bats away from your property.
Diseases from Bats
- Analysis of
what kinds of diseases bats can carry and cause in humans.
- Pictures of bat poop and
info about danger, and diseases from bat droppings.
How to Kill a Bat
- Does poison work to
kill bats? Is killing bats the best approach?
- Analysis of various
bat deterrents and repellent products.
How To Trap a Bat
- Methods for catching
bats in cage traps.
What Diseases to Bats Carry?
What areas can bats enter a house through?
How to Keep Bats out of a Barn
Biology of Big Brown Bat
Are bats blind?
Biology of Little Brown Bat
Should you ever trap a Bat in a Cage?
What Should I do with a Bat after I Catch It
in my House?
Do bats chew on wires?
Bats Stuck in the Fireplace?
What is a bat maternity colony?
How do bats communicate?
Biology of Mexican Free tail Bat
Will repellents get a bat out of
How to remove bat feces from
Is Bat Feces Dangerous to Touch or
What kind of damage do bats cause in an
What is a Bat's Natural Diet?
How do bats use echolocation?
How to inspect a house for bat entry holes
Biology of Evening Bat
How to use a one way exclusion funnel to
rid your building of bats
What can bats chew through?
What is a bat's natural habitat?
Will homeowners insurance pay for bat
Will a bat house prevent bats in your
Will the city or county animal services help
me with a bat issue?
Will a bright light or high pitch sound
deterrent machine work on bat?
Will a bat in the attic have a nest of
Will a pest control company remove a bat?
Is it Legal for Me to Trap a Bat?
How to Locate and Remove a Dead Bat
Bat Exclusion Material
What is the summer maternity season?
How to get bats out of the attic
Bat Mating Habits
What property modifications will keep down
Do mothballs or ammonia help repel bats?
Do Bats Make Good Pets?
Should I Poison a Bat?
How do I clean Bat Feces out of my Attic?
North American Bats Biology and Information
There are over forty-six species of bats in the United States with
the Little Brown and the Big Brown in the north and the Mexican
Freetail in the southwest, being the most common. These eco-friendly
mammals are important to the balance of vegetation and insects and
are protected in most states. Bats make up about 20% of all mammals
and are needed for pollination and insect control. They are the only
true flying mammal.
- Most bats are nocturnal that come out right after
sunset. The bats diet consists of insects although there are some
bats that feed on fruit and berries. They hibernate in the winter
during the cold and come out when the insects start arriving. Bats
will not fly in the rain because it affects the sonar capability
that they have in bred. Most bats can eat up to one third their body
weights and consume hundreds of insects in one night. These mammals
cannot see very well and use sound to hunt for their food while
using their wings to catch their prey. They will then return to the
roost to feed.
Life Cycle and Reproduction
- A bat can live up to twenty
years and usually will only have one baby a year, which keeps the
bat population limited. The bats do have predators of hawks and
falcons which also contribute to a slow population growth. Female
bats can actually control their pregnancy timing and when their
young are going to be born. They have an instinct for food supply
and the ecological environment that determines when they will breed.
The females will store the sperm from the male until conditions
become more favorable to reproduction.
Female bats will feed their babies, sometimes called pups, until
they can fly which is usually two to four months after birth. Pups
rely on the mother's milk and after a few weeks are expected to hunt
for their own food. Pups are born alongside other bat pups and will
usually be kept together until they are old enough to leave the
roost. The mother will always know where her pup is even within a
colony by its sound and smell.
- Bats basically have two requirements for living, a
place where they can sleep during the day or hibernate during the
winter, and places where they can find food. Other than these two,
they will find a place anywhere that there is shelter and plenty of
insects. Their roosts or home is usually in caves, under bridges, or
even attic if they are assessable. Bats are considered protected
which means that you cannot harm a bat or its roost. Many places
will make up bat houses to deter from using homes as a roost.
Common Disease These Animals Can Spread
- The main concern
with bats is rabies. They are about twenty-five percent of the wild
animal life that carries this disease. But in contrast more rabies
is transferred from bats to humans than any other species. Bats that
are rabid usually cannot fly because they are sick themselves and it
is best if a bat is found on the ground to walk away and call
someone. The bats have also been known to carry SARS (severe acute
respiratory syndrome) and Henipavirus. They have very small teeth
that can bite, especially a sleeping person that can go undetected,
so care should be given if bats are in the home. The guano or bat
droppings can also be infected with fungi and can become a health
Common Nuisance Complaints
- If there is a colony of bats
within or around your home it is possible that you may get sick from
their habitat. What will be discovered is the rancid odor from the
guano which has an ammonia smell. The droppings, if they become
thick will rot out a ceiling. Bats can also be noisy at night since
they are nocturnal.