The Little Brown Bat (Myotis Lucifugus) is possibly the most abundant bat in North America. These mammals are common in and around cities.
On sumer days thousands may hang upside down in an attic or loft. These sleeping groups are composed solely of females and young, for Little Brown Bats, like many other species, separate by sex before the young are born. Males also roost during the day but usually as solitary individuals. These little bats, also called Myotis, are insectivores, eating a large variety of flying insects, including mosquitoes. They use echolocation to find their prey. Little Brown Bats are about 3 to 4-1/2 inches long with a wingspan of from 8 to 10 inches. They can live up to 30 years old. I remember staying at my grandparents cabin on the East Coast every summer as a child. The cabin had shutters and a male Little Brown Bat could always be found sleeping there during the day. Then as the day waned, the little guy would take off and fly through the farmland catching insects.