Bats are nocturnal animals that may infest your home, if 
they think your property is suitable for a den. Understanding their 
mating and reproduction habits will prevent them from breeding in your 
attic, roof or the spaces between walls.
Animal control
 experts agree that bats may multiply quickly, if they infest your home 
in pairs. Once you see a couple flying out or around your property at 
night, chances are they already have offspring and may grow their 
colony.
Brown Bat Mating Season and Reproduction
In
 most of Canada, brown bats mate in two phases, passive and active. In 
the latter phase, both partners are alert and fully awake. In their 
passive phase, active males will try to mate with drowsy bats regardless
 of gender. The active mating phase is more common because these are 
times when testosterone are at peak levels. Active mating reaches its 
highest in August, while passive mating lasts until winter.
When 
mating, males mount the female from the rear and sometimes use a 
copulation call to calm her so that there is no struggle. Bats will mate
 promiscuously, neither male or female bats are selective of their 
potential mate, and males cannot monopolize females even when they are 
in torpid.
In spring, females live in nursery colonies which may 
likely be the same place where they were born. These comprise mainly of 
adult female bats with their babies; they may also roost in attics of 
warm homes or buildings because of their humidity. These colonies may 
reach thousands per forest or cave. Gestation may last 50 to 60 days; 
females have one baby per year or twins, from late May to early June.
The
 young enter an altricial state when born, they keep their eyes closed 
and will hang in their nursery while their mothers look for food at 
night. They only open their eyes on the second day and cling to a nipple
 until they reach two weeks old. After three weeks, they start flying 
and by the fourth week, they reach adult size.
Females mature 
sexually in the fall after their birth, while males may take a year; 
most male bats and approximately half of females start breeding during 
their first autumn.
Problems Caused
When you fail to get bat exclusion
 services after you discover an infestation, you will have to deal with 
the foul smell of urine and guano. Bats are also carriers of the rabies 
virus, which it can transmit to you through its bite. These animals also
 bring all sorts of bacteria and insects that may cause harmful 
diseases.
Bats may also damage drywall, insulation and electrical
 wiring. The damage may affect the energy consumption of your home, 
leading to a higher energy and repair bill. With the help of an animal 
control expert, you can prevent infestation or remove the bats already 
in your attic or other parts of your house.
 Removers will use 
humane and proven techniques to remove bats in various parts of your 
house. Some will also remove the guano and urine left behind by these 
animals. They will deodorize the area and clean up the mess to prevent a
 re-infestation.
