These bats are approximately 2.5 – 4” in size, weighing less than ½ ounce with a wing span of 11”. They are distinguishable by the brown fur that is darker on their back than on their undersides.
They will mate in the fall, but females delay fertilization until the spring. Females give birth to one bat in late June or early July.
They can be found in various structures such as barns, garages, houses and cottages. They will be inactive during the day but will emerge to feed in the evening. Little brown bats typically eat half of their body weight in insects per night.