Specialist hunting strategies demand particular adaptations of the body, from fearsome teeth to scimitar-sharp claws and tusks. In the natural world there are razors, guillotines, daggers, clubs and spears a galaxy of animal kitted out with an arsenal of weapons to gain a meal. To get close enough, many use stealth, speed and surprise. Besides outright warfare, these weapons are also used in aggressive displays to threaten and intimidate competitors and predators alike.