It sometimes bites human beings, but such incidents are rare. Vampire bats approach their prey on foot. They scoop out a small piece of the victim's skin with their sharp teeth and then lick blood from the wound. The wound they give their victims heals quickly, but these bats may carry rabies. Brown bats include the big brown bat and the little brown bat, both of which live in the United States.
Brown bats live in buildings or caves, and some migrate before they hibernate in winter.
The little brown bat has dark brown fur and black forearms and ears. Free-tailed bats are a group of dark brown bats that live throughout the world. Their tail extends beyond the tail membrane. Mexican freetailed bats live in colonies, mostly in caves. White hairs cover its reddish-brown underfur, giving the bat a spotted appearance.