The sound of cicadas humming gives way to high-pitched squeaking. The sky darkens. Some people settle into folding chairs and turn their heads to the sky as little black blobs shoot out of a storm ...

Arizona is home to 28 bat species, from the small, agile Myotis to the newest discovery, Mexican long nosed bats. And the "Phoenix Bat Cave," a storm tunnel along the Arizona Canal near 37th Place ...