Recent research has found that Mexican free-tailed bats can reach 99 mph in level flight. That is better than any bird or other flying mammal! And it’s fast!
The bats reach these speeds for short periods of time, and scientists are not sure why they go so fast then. Flying is very energy intensive, and fast flying just intensifies it even more.
Mexican free-tails are built for speed, with long narrow wings and small, streamlined bodies.
You can learn more here. The photo shows Mexican free-tailed bats leaving a bridge north of Austin, Texas, at dusk.