In the animal kingdom, females are tough, feisty and fearless. But these lady-killers don't just get by on their good looks; they use their paws, claws and jaws to ensure survival – for themselves and their offspring. From the fierce protectiveness of a mama grizzly bear, to the cunning teamwork employed by lady lions – this hour of WORLD'S DEADLIEST is dedicated to the KILLER BITCHES. http://channel.nationalgeographic.com/wild/episodes/lady-killers/