The Mexican Freetail, which roosts under our freeways and in caves, even shows up on radars during their evening mass exodus to find food and eats an untold amount of bugs every spring and summer.

On one side of the drain a sign says “No Trespassing” and on the other side there’s a sign with facts about Mexican free-tailed bats. The bats are visitors to Phoenix for the summertime ...

And the "Phoenix Bat Cave," a storm tunnel along the Arizona Canal near 37th Place, attracts thousands of Mexican free-tailed bats each summer. The bats swarm out nightly, providing a unique ...

Every summer between May and October, as they migrate south toward Mexico, a colony of some 20,000 Mexican free-tailed bats make a flood control tunnel their temporary nesting spot. That means ...