Brazilian free-tailed bats are medium-sized bats known for their long, narrow wings and distinctive tail that extends beyond the tail membrane. They are found throughout the Americas, from the southern United States to Argentina. These bats are highly agile flyers, capable of reaching speeds over 99 miles per hour, making them one of the fastest flying mammals. These bats primarily feed on insects, including moths and beetles, which they catch in flight. They roost in large colonies, often in caves or under bridges, where they can number in the thousands. Their social behavior and echolocation abilities help them navigate and hunt effectively in the dark.