Nightwing

Vampire bats: Evil. Clever.
Deadly.
Driven by blood-hunger across the American landscape, they bred and multiplied, unseen and unsuspected, each one a grisly messenger of death. No warm-blooded creature is safe from their thirst. Now, as darkness gathers, the sky is filled with the frantic motion, the maddening murmur of . . . Nightwing.