The crocodile has few natural predators, an armor of bony plates covering most of its body and strong jaws capable of crushing anything from bones to cast iron.

The Bear League's tough love and intimidation encourage bears to stay out of human territory.

(Airs Sunday, June 21) Explore the wickedly ingenious ways our wild neighbors are staking their claim for territory in an increasingly human-controlled world.

NATURE investigates the sometimes exasperating efforts of people and wild animals to adapt to each other when their worlds collide.