12/12 How a bird of prey's anatomical and physiological adaptations help it dominate the skies.
11/12 Delving beneath a snake's skin to discover what makes it such a successful predator.
10/12 How tiny hairs on their wings give bats a detailed air-flow map during flight.
9/12 How dolphins hunt using a combination of specialised anatomy and complex communication.
8/12 How the crocodile's circulatory system enables it to hold its breath underwater.
7/12 How the great ape's brain has been adapted by its anatomy, ingenuity and sociability.
6/12 Chris Packham explores the anatomy and physiology of the world's largest land animal.
5/12 How the fox's senses, intelligence and flexibility help it compete in the modern world.
4/12 Chris Packham explores how ants have collaborated to achieve their global success.
3/12 Chris Packham explores what makes big cats such good hunters.
2/12 Chris Packham explores the specialised adaptations that have enabled bears to thrive.
1/12 How the penguin's legs, wings and body shape have helped it conquer a range of habitats.