The Little Brown Bat is found all across Canada, and has the largest distribution of all Canadian bats. In Canada, it is found in all provinces and territories except Nunavut. Little brown bats weigh only seven to 14 grams, and have a wingspan of 22-27 centimetres.
Contrary to the myth that bats are blind, Little Brown Bats have excellent vision. Although echolocation is important, they also use visual cues, especially during long distance migration.
Maternity colonies often roost in buildings, (like the old Peachland Primary School) but they also use tree cavities or other places that stay dark and warm during the day, like bat boxes. Little Brown Bats will mate in the fall, and can mate several times with different partners. Females will store the males’ sperm throughout the winter until they ovulate in the spring.
The gestation period lasts around 50 to 60 days, and at the end, a single pup is born in June or July. Little Brown Bat pups can fly at just about four weeks old!
Conservation status: While 50 per cent of the little brown bat’s global range is in Canada, this species is endangered in Canada. This is mainly due to white-nose syndrome, a fungus that thrives in cool, moist environments and infects the exposed skin of the muzzle and wings of hibernating bats. It causes bats to use more energy than they can afford during hibernation and to wake up more frequently than healthy bats, often leading to death.
Yuma Myotis is a common bat species found in British Columbia. Its length is eight to 10 cm and has a wingspan of 22 to 26 cm. It varies in colour from dark brown to tan-grey.
They tend to enjoy roosting in caves, buildings, mines and bat houses. The females roost together from April to late August or October, depending on the location. We don’t know exactly how long the gestation period is, but sometime in May or June, the females give birth to one pup. Yuma bats tend to hibernate in buildings, dead trees and mines.