Chisellers: Special tools like chisel-sharp front teeth and underground dwelling enable this group of mammals to feast on the toughest roots and seeds.

Meat eaters: Predators and their prey must evolve speed, endurance and maneuverability to outwit each other. With all hunters, the aggression of the kill means the difference between life and death.

The opportunists: Omnivores will eat whatever is around at the time, making them highly adaptable. Among this group are some of the most charismatic and widespread mammals on the planet.