Houston (AFP) – It was a rescue worthy of Batman. A wave of frigid air triggered “hypothermic shock” in a colony of bats clinging to their roost beneath a bridge in Houston, a sprawling city in Texas. Nearly frozen, the bats began losing their grip and falling to the pavement from nine meters (30 feet) up, the Houston Humane Society reported on its Facebook page. The Mexican free-tailed bats “are tiny, and have minimal body fat, so they are not able to live long when laying exposed on the ground in freezing temperatures,” the Humane Society explained. As the cold wave intensified last Thursday…