There's chaos in the animal kingdom from Massachusetts to California -- coyotes stalk an unsuspecting hiker, thousands of birds inexplicably fall from the sky, chimpanzees terrorize a suburban neighborhood and an escaped zoo tiger goes on the attack.

When animals run wild, people call 9-1-1. Bystanders help save two men swarmed by bees in Texas and a girl mauled by a bear in Alaska. And an Ohio sheriff's department goes on tactical alert when dozens of exotic animals escape from a private zoo.