An adult Mexican Free-tailed bat weighs about .42 to .53 ounces.
Males are usually a little bigger than females.
Mexican Free-tailed bats usually migrate to central Mexico. Their favorite food is moths, but they also eat beetles and flying ants. There are three famous locations of colonies of Mexican Free-tailed bats. Bracken Cave in Texas has about 20 million bats. The colony eats about 250 tons of insects a night.